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Những câu hỏi liên quan
Nguyễn Ngọc Tú
Xem chi tiết
Vu_Trung_Hieu
22 tháng 3 2020 lúc 9:20

a) (-18)+(-31)+98+|-18|+(-69)

((-18)+98)+((-31)+18+(-69))

80+ (-82)

-2

b)15×(-176)+15×76+100×15

=15×((-176)+76+10)

=15×0

=0

c)79×89-79×(-11)-100×79

=79×(89-(-11)-100)

=79×0

=0

Chúc bạn học tốt

Khách vãng lai đã xóa
.
22 tháng 3 2020 lúc 9:22

a) (-18)+(-31)+98+|-18|+(-69)

=(-18)+(-31)+98+18+(-69)

=[(-18)+18]+[(-31)+(-69)]+98

=0+(-100)+98

=-2

b) 15.(-176)+15.76+100.15

=15[(-176)+76+100]

=15.0=0

c) 79.89-79.(-11)-100.79

=19.[89-(-11)-100]

=19.0=0

Khách vãng lai đã xóa
Lê Xuân Hùng
22 tháng 3 2020 lúc 9:36

a, -18-31+98+18-69=(-18+18)-(31+69)+98= -100+98= -2

b, 15 x (-176+76+100)= 15 x 0 = 0

c, 79 x (89+11-100)= 79 x 0=0

                                                                                  THE END

Khách vãng lai đã xóa
shir
Xem chi tiết
❄Người_Cao_Tuổi❄
8 tháng 5 2022 lúc 14:36

z là gì vậy bn

Hiếu Nguyễn
8 tháng 5 2022 lúc 14:38
TV Cuber
8 tháng 5 2022 lúc 14:39

A ) \(=\dfrac{2\times9\times11\times2\times19\times2}{11\times19\times9}=\dfrac{8}{1}=8\)

b)\(=\dfrac{2}{5}\times\left(\dfrac{4}{7}+\dfrac{9}{7}+\dfrac{8}{7}\right)=\dfrac{2}{5}\times\dfrac{21}{7}=\dfrac{2}{5}\times3=\dfrac{6}{5}\)

Vũ Thị Thanh Hằng
Xem chi tiết
haiduong le
20 tháng 12 2021 lúc 20:01

    1/9 x 4/11 + 3/4 +7/11 x 1/9

= 1/9 x (4/11 + 7/11) + 3/4

= 1/9 x 1 + 3/4

=1/9 + 3/4

= 31/36

Khách vãng lai đã xóa
Trần Thị Phương Linh
22 tháng 12 2021 lúc 18:27
          
          
          
          
          
          
          
          
          
          
          
          
          
          
          
          
          
          
          
          
          
          
          
          
          
          
          
          
          
          
          
          
          
          
          
          
          
          
          
          
          
          
          
          
          
          
          
          
          
          
          
          
          
          
          
          
          
          
          
          
          
          
          
          
          
          
          
          
          
          
          
          
          
          
          
          
          
          
          
          
          
          
          
          
          
          
          
          
          
          
          
          
          
          
          
          
          
          
          
          
          
          
          
          
          
          
          
          
          
          
          
          
          
          
          
          
          
          
          
          
          
          
          
          
          
          
          
          
          
          
          
          
          
          
          
          
          
          
          
          
          
          
          
          
          
          
          
          
          
          
          
          
          
          
          
          
          
          
          
          
          
          
          
          
          
          
          
          
          
          
          
          
          
          
          
          
          
          
          
          
          
          
          
          
          
          
          
          
          
          
          
          
          
          
          
          
          
          
          
          
          
          
          
          
          
          
          
          
          
          
          
          
          
          
          
          
          
          
          
          
          
          
          
          
          
          
          
          
          
          
          
          
          
          
          
          
          
          
          
          
          
          
          
          
          
          
          
          
          
          
          
          
          
          
          
          
          
          
          
          
          
          
          
          
          
          
          
          
          
          
          
          
          
          
          
          
          
          
          
          
          
          
          
          
          
          
          
          
          
          
          
          
          
          
          
          
          
          
          
          
          
          
          
          
          
          
          
          
          
          
          
          
          
          
          
          
          
          
          
          
          
          
          
          
          
          
          
          
          
          
          
          
          
          
          
          
          
          
          
          
          
          
          
          
          
          
          
          
          
          
          
          
          
          
          
          
          
          
          
          
          
          
          
          
          
          
          
          
          
          
          
          
          
          
          
          
          
          
          
          
          
          
          
          
          
          
          
          
          
          
          
          
          
          
          
          
          
          
          
          
          
          
          
          
          
          
          
          
          
          
          
          
          
          
          
          
          
          
          
          
          
          
          
          
          
          
          
          
          
          
          
          
          
          
          
          
          
          
          
          
          
          
          
          
          
          
          
          
          
          
          
          
          
          
          
          
          
          
          
          
          
          
          
          
          
          
          
          
          
          
          
          
          
          
          
          
          
          
          
          
          
          
          
          
          
          
          
          
          
          
          
          
          
          
          
          
          
          
          
          
          
          
          
          
          
          
          
          
          
          
          
          
          
          
          
          
          
          
          
          
          
          
          
          
          
          
          
          
          
          
          
          
          
          
          
          
          
          
          
          
          
          
          
          
          
          
          
          
          
          
          
          
          
          
          
          
          
          
          
          
          
          
          
          
          
          
          
          
          
          
          
          
          
          
          
          
          
          
          
          
          
          
          
          
          
          
          
          
          
          
          
          
          
          
          
          
          
          
          
          
          
          
          
          
          
          
          
          
          
          
          
          
          
          
          
          
          
          
          
          
          
          
          
          
          
          
          
          
          
          
          
          
          
          
          
          
          
          
          
          
          
          
          
          
          
          
          
          
          
          
          
          
          
          
          
          
          
          
          
          
          
          
          
          
          
          
          
          
          
          
          
          
          
          
          
          
          
          
          
          
          
          
          
          
          
          
          
          
          
          
          
          
          
          
          
          
          
          
          
          
          
          
          
          
          
          
          
          
          
          
          
          
          
          
          
          
          
          
          
          
          
          
          
          
          
          
          
          
          
          
          
          
          
          
          
          
          
          
          
          
          
          
          
          
          
          
          
          
          
          
          
          
          
          
          
          
          
          
          
          
          
          
          
          
          
          
          
          
          
          
          
          
          
          
          
          
          
          
          
          
          
          
          
          
          
          
          
          
          
          
          
          
          
          
          
          
          
          
          
          
          
          
          
          
          
          
          
          
          
          
          
          
          
          
          
          
          
          
          
          
          
          
          
          
          
          
          
          
          
          
          
          
          
          
          
          
          
          
          
          
          
          
          
          
          
          
          
          
          
          
          
          
          
          
          
          
          
          
          
          
          
          
          
          
          
          
          
          
          
          
          
          
          
          
          
          
          
          
          
          
          
          
          
          
          
          
          
          
          
          
          
          
          
          
          
          
          
          
          
          
          
          
          
          
          
          
          
          
          
          
          
          
          
          
          
          
          
          
          
          
          
          
          
          
          
          
          
          
          
          
          
          
          
          
          
          
          
          
          
          
          
          
          
          
          
          
          
          
          
          
          
          
          
          
          
          
          
          
          
          
          
          
          
          
          
          
          
          
          
          
          
          
          
gyyeshqadfghfgddsfsafasfdfdddsfdsdasdsdafffffffffffffffffffffffffffffffffffffffffffffffffffffff         
          
          
          
          
          
          
          
          
          
          
          
          
          
          
          
          
          
          
          
          
          
          
          
          
          
          
Khách vãng lai đã xóa

\(\frac{1}{9}x\frac{4}{11}+\frac{3}{4}+\frac{7}{11}x\frac{1}{9}\)

\(=\frac{1}{9}x\left(\frac{4}{11}+\frac{7}{11}\right)+\frac{3}{4}\)

\(=\frac{1}{9}x1+\frac{3}{4}\)

\(=\frac{1}{9}+\frac{3}{4}\)

\(=\frac{31}{36}\)

\(\text{Hok tốt!}\)

\(\text{@Kaito Kid}\)

Khách vãng lai đã xóa
Phạm Huyền My
Xem chi tiết

trả lời:

B = 7x( 5/2x7 + 4/7x11 + 3/11x14 + 1/14x15 + 13/15x28 )

B = 7x(1/2 - 1/7 + 1/7 - 1/11 +....+ 1/15 - 1/28)

B = 7x(1/2 - 1/28)

B = 7x13/28

B = 13/4

Khách vãng lai đã xóa
Kiyotaka Ayanokoji
7 tháng 7 2020 lúc 5:11

Bàì làm:

\(B=\frac{5}{2.1}+\frac{4}{1.11}+\frac{3}{11.2}+\frac{1}{2.15}+\frac{13}{15.4}\)

\(B=7.\left(\frac{5}{2.7}+\frac{4}{7.11}+\frac{3}{11.14}+\frac{1}{14.15}+\frac{13}{15.28}\right)\)

\(B=7.\left(\frac{1}{2}-\frac{1}{7}+\frac{1}{7}-\frac{1}{11}+\frac{1}{11}-\frac{1}{14}+\frac{1}{14}-\frac{1}{15}+\frac{1}{15}-\frac{1}{28}\right)\)

\(B=7.\left(\frac{1}{2}-\frac{1}{28}\right)\)

\(B=7.\frac{13}{28}\)

\(B=\frac{13}{4}\)

Khách vãng lai đã xóa
Ngô Chi Lan
7 tháng 7 2020 lúc 7:43

Bài làm:

\(B=\frac{5}{2.1}+\frac{4}{1.11}+\frac{3}{11.2}+\frac{1}{2.15}+\frac{13}{15.4}\)

\(B=7\left(\frac{5}{2.7}+\frac{4}{7.11}+\frac{3}{11.14}+\frac{1}{14.15}+\frac{13}{15.28}\right)\)

\(B=7\left(\frac{1}{2}-\frac{1}{7}+\frac{1}{7}-\frac{1}{11}+\frac{1}{11}-\frac{1}{14}+\frac{1}{14}-\frac{1}{15}+\frac{1}{15}-\frac{1}{28}\right)\)

\(B=7\left(\frac{1}{2}-\frac{1}{28}\right)=7.\frac{13}{28}=\frac{13}{4}\)

Khách vãng lai đã xóa
Lê Thị Phương Dung
Xem chi tiết
Rinu
8 tháng 7 2019 lúc 9:01

1.Tính hợp lí:

-5/9.3/11+(-3/18).3/11

=3/11.[(-5/9)+(-3/18)]

=3/11.-13/18

=-39/198

=13/66

2.Tìm x biết:

2/3+7/4:x=5/6

       7/4:x=5/6-2/3

       7/4:x=1/6

             x=7/4:1/6

             x=21/2      

anh_tuấn_bùi
8 tháng 7 2019 lúc 9:04

bài 1

\(\frac{-5}{9}.\frac{3}{11}+\frac{-3}{18}.\frac{3}{11}\)

\(\frac{3}{11}.\left(\frac{-5}{9}+\frac{-3}{18}\right)\)

\(\frac{-13}{66}\)

bài 2

\(\frac{2}{3}+\frac{7}{4}:x=\frac{5}{6}\)

\(\frac{7}{4}:x=\frac{1}{6}\)

\(x=\frac{21}{2}\)

ran mori
Xem chi tiết
đỗ ngọc phong
12 tháng 6 2017 lúc 9:07

A=-5/7x2/11+-5/7x9/11+1+5/7

A=5/7x-2/11+5/7x-9/11+1+5/7

A=5/7x[-2/11+-9/11+1]+1

A=5/7x0+1

A=0+1

A=1

ran mori
12 tháng 6 2017 lúc 9:02

lí luận rõ ra nhé

Nguyễn Thị Ngọc Anh
12 tháng 6 2017 lúc 9:10

A=\(\frac{-5}{7}\)x  \(\frac{2}{11}\)+  \(\frac{-5}{7}\)x  \(\frac{9}{11}\) +   \(1\frac{5}{7}\)

A= \(\frac{-5}{7}\)x (\(\frac{2}{11}\)+   \(\frac{9}{11}\)) +  \(\frac{12}{7}\)

A=  \(\frac{-5}{7}\)x 1 + \(\frac{12}{7}\)

A=  \(\frac{-5}{7}\)+    \(\frac{12}{7}\)

A=  1

ngũ huyền thanh
Xem chi tiết