lớp 1 mà cậu

4.24.5²-(3³.18+3³.12)

=4.24.25-[27.(18+12)]

=(4.25).24-[27.30]

=100.24-810

=2400-810

=1590

4.24.5^2-(3^3.18+3^3.12)

31.15.7^2.4-31.49.40

1+2+3+4+5+6+7+8+9+10

1+3+5+7+9+11+13+15+19

2+6+10+14+22+23+26+34

5+8+11+14+17+20+23+26+29

1+6+11+16+21+26+31+36+41+47+51

10+13+16+19+22+25+28+31+34+37+40

5+7+9+11+13+15+17+3+8+13+18+23+28

4+7+10+13+16+19+5+9+13+17+21+25 = 1590

#HT#

300

300

= 300 

1+2+3+4+5+6+7+8+9+10+11+12+13+14+15+16+17+18+19+20+21+22+23+24+25+26+27+28+29+30+31+32+33+34+35+36+37

=(1+37)x37:2

=703

lop 1 khong co cau nay

Kết quả là 703 nha bạn

\(\dfrac{3}{8}+\dfrac{-11}{8}=1\)

\(\dfrac{22}{9}+\dfrac{10}{18}=3\)

1<x<3

=>x=2

* 100 là cái gì vậy .nhân à

79600 nha

=79600

giúp mình nhanh nhanh mk đg gấp mk sẽ k cho

lộn mk sẽ k cho

mk cần gấp please help meeeee

-2 và 0 nha bạn

 5/11+16/22+(-12/4) +(-2/11)

       = -2

7/23+(-10/18+(-4/9)+16/23

 = 0

bn quy đồng mẫu số nha

duyệt đi

Co' thể rút gọn r tính :

5/11 + 8/11 + -3 + -2/11 = (5/11 + -2/11+ 8/11) + -3 = 1 + -3 = -2

7/23 + -5/9 + -4/ 9 + 16/23 = (7/23 + 16/23) + (-5/9 + -4/9) = 1 + -1 = 0

Đây la` dạng tính nhanh nha bn

1/2+3/6+5/10+7/14+9/18+11/22

=0,5+0,5+0,5+0,5+0,5+0,5

=3

\(\frac{1}{2}+\frac{3}{6}+\frac{5}{10}+\frac{7}{14}+\frac{9}{18}+\frac{11}{22}=\frac{1}{2}+\frac{1}{2}+\frac{1}{2}+\frac{1}{2}+\frac{1}{2}+\frac{1}{2}=\frac{1}{2}.6=\frac{6}{2}=3\)

\(\frac{1}{2}+\frac{3}{6}+\frac{5}{10}+\frac{7}{14}+\frac{9}{18}+\frac{11}{22}\)

\(=\frac{1}{2}+\frac{1}{2}+\frac{1}{2}+\frac{1}{2}+\frac{1}{2}+\frac{1}{2}\)

\(=\frac{1}{2}×6\)

\(=\frac{1}{2}×\frac{6}{1}\)

\(=\frac{1×6}{2×1}\)

\(=\frac{6}{2}\)

\(=6:2\)

\(=3\)