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Nguyễn Anh Hoàng
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thaoan
9 tháng 12 2017 lúc 15:06

CÁI / NÀY LÀ PHÂN SỐ À

Lê Bảo Kỳ
6 tháng 5 2018 lúc 15:28

=1.4/90+1.5/90+1.2/90+1.10/90

=4/90+5/90+2/90+10/90

=4+5+2+10/90

=21/90

=7/30

khoi my
6 tháng 5 2018 lúc 15:29

 1/90:0,25 +1/90:0,2 +1/90 :0,5 +1/90:0,125-1/90 :0,1

=1/90 : ( 0,25 + 0,2 + 0,5 + 0,125 - 0,1 )

= 1/90 : 0,975

= 1/90 : 975/100

= 1/90 : 39/4

= 2/1755

Nguyen ngoc sumi
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Nguyen ngoc sumi
3 tháng 12 2017 lúc 12:25
Mấy bài này đều la tinh nhanh các ban lam cho minh nhe cam ơn nhieu
helen
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Thảo Nguyễn『緑』
14 tháng 2 2018 lúc 17:33

1/90 : 0,25 + 1/90 : 0,2 + 1/90 : 125 - 1/90 : 0,1

= 1/90 x 4 + /90 x 5 + 1/90 x 8 : 1/90 x 10

= 1/90 x ( 4 + 5 + 8 + 10 )

= 1/90 x 27

= 3/10

Tề Mặc
15 tháng 2 2018 lúc 11:28

\(\frac{1}{90}\) : 0,25 + \(\frac{1}{90}\) : 0,2 + \(\frac{1}{90}\) : 125 - \(\frac{1}{90}\) : 0,1

= \(\frac{1}{90}\) x 4 +\(\frac{1}{90}\)  x 5 +  x\(\frac{1}{90}\) 8 : \(\frac{1}{90}\) x 10

= \(\frac{1}{90}\) x ( 4 + 5 + 8 + 10 )

=\(\frac{1}{90}\) x 27

\(\frac{3}{10}\)

hok tốt !

Lê Trọng Chương
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Incursion_03
29 tháng 7 2018 lúc 21:13

sao bạn tự đăng tự giải thế? hay là bạn giải cho ai à?

Lê Trọng Chương
29 tháng 7 2018 lúc 21:14

ukm bn

lâm tất toại
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Uchiha Sasuke
9 tháng 11 2016 lúc 19:53

Tính 0,2(45)=245-1/900=244/900=62/225

dấu /là phân số đó nhé

Nguyễn văn công
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๛Ňɠũ Vị Čáէツ
8 tháng 6 2018 lúc 7:45

\(S=\frac{3}{4}-0,25-\left[\frac{7}{3}+\left(\frac{-9}{2}\right)\right]-\frac{5}{6}\)

\(S=\frac{3}{4}-\frac{1}{4}-\left[\frac{14}{6}+\left(\frac{-27}{6}\right)\right]-\frac{5}{6}\)

\(S=\frac{1}{2}-\left(\frac{-13}{6}\right)-\frac{5}{6}\)

\(S=\frac{3}{6}-\left(\frac{-13}{6}\right)-\frac{5}{6}\)

\(S=\frac{11}{6}\)

công đạt
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nguyển văn hải
31 tháng 5 2017 lúc 16:13

c) x=-2 nha

d) =\(\frac{1}{5.6}\)+\(\frac{1}{6.7}\)+......+\(\frac{1}{11.12}\)

=\(\frac{1}{5}\)-\(\frac{1}{6}\)+\(\frac{1}{6}\)-\(\frac{1}{7}\)+.....+\(\frac{1}{11}\)-\(\frac{1}{12}\)

=\(\frac{1}{5}\)-\(\frac{1}{12}\)\(\frac{7}{60}\)

nguyen thi trang
31 tháng 5 2017 lúc 16:28

bạn ơi kết quả là 7/60

Nguyễn Tiến Dũng
31 tháng 5 2017 lúc 16:48

\(=\frac{1}{5.6}+\frac{1}{6.7}+...+\frac{1}{11.12}\)

\(=\frac{1}{5}-\frac{1}{6}+\frac{1}{6}-\frac{1}{7}+...+\frac{1}{11}-\frac{1}{12}\)

\(=\frac{1}{5}-\frac{1}{12}\)

\(=\frac{7}{60}\)

Nguyễn Anh Đức
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Nguyễn Xuân Anh
27 tháng 12 2017 lúc 22:43

=1-1+1-1 =0

Nguyễn Lê Thành Vinh Thi...
27 tháng 12 2017 lúc 22:45

\(\frac{1}{2}:0,5-\frac{1}{4}:0,25+\frac{1}{8};0,125-\frac{1}{10}:0,1=\frac{1}{2}:\frac{1}{2}-\frac{1}{4}:\frac{1}{4}+\frac{1}{8}:\frac{1}{8}-\frac{1}{10}:\frac{1}{10}=1-1+1-1=0+0=0\)

le viet hung
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Trần Minh Chiến
4 tháng 1 2017 lúc 20:07

em ơi cái này = 0 . Anh chắc chắn vs em 100000000000000000000000000000000000000000000000000000000000000000%

Anh lớp 7 mà

sakura
4 tháng 1 2017 lúc 20:08

\(\frac{1}{2}:0,5-\frac{1}{4}:0,25+\frac{1}{8}:0,125-\frac{1}{10}:0,1\)

\(=\left(0,5:0,5\right)-\left(0,25:0,25\right)+\left(0,125:0,125\right)-\left(0,1:0,1\right)\)

\(=1-1+1-1\)

\(=\left(1\times2\right)-\left(1\times2\right)\)

\(=2-2\)

\(=0\)

le viet hung
4 tháng 1 2017 lúc 20:16

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