21,37 x 27,5 + 72,4 x 21,37 + 2,137 = 21,37 x (27,5 + 72,4) + 21,37 x 0,1 = 21,37 x ( 99,9 + 0,1) = 21,37 x 100 = 2137

21,37*27,5+72,4*21,37+21,37

=21,37*(27,5+72,4+1)

=21,37*100,9

=2156,233

CHÚC BN HK TỐT NHÉ

Trả lời:

21,37 x 27,5 + 72,4  x 21,37 + 21,37

=21,37 x 27,5 + 72,4  x 21,37 + 21,37 x 1

=21,37 x (27,5 + 72,4 + 1)

=21,37 x 100,9

=2156,233.

~ Hok tốt~

~ Tiểu Minh Ngọc~

21,37 x 27,5 + 72,4 x 21,37 + 21,37

=21,37 x 27,5 + 72,4 x 21,37 + 21,37 x 1

= 21,37 x ( 27,5 + 72,4 + 1)

= 21,37 x 100,9

=2156,233.

~Hok tốt~

~ Tiểu Minh Ngọc~

\(=21,37\cdot\left(27,5+72,4+0,1\right)=21,37\cdot100=2137\)

thank you

\(=21,37\cdot27.5+72.4+21.37+21.37\cdot0.1\)

\(=21.37\left(27.5+72.4+0.1\right)=21.37\cdot100=2137\)

bạn lấy 0,1 ở đâu thế

bạn thử lấy 2,75+71,5 sau đó nhân 21,37 thử

= \(21,37.\left(26,5+72,5+1\right)=21,37.100=2137\)

a: 15,63-7,16+4,31

≃15,6-7,2+4,3

=12,7

b: -15,62*8,1≃-15,6*8=-124,8

c: \(\left(4,375+5,2\right)-\left(6,452-3,55\right)\)

=4,375+5,2-6,452+3,55

≃4,4+5,2-6,5+3,6

=6,7

d: \(\frac{\left(6,6-3,124\right)\cdot5,38}{\left(21,37-1,25\right)\cdot2,5}\simeq\frac{\left(6,6-3,1\right)\cdot5,4}{\left(21,4-1,3\right)\cdot2,5}\)

\(=\frac{3,5\cdot5,4}{20,7\cdot2,5}=\frac{5.4}{20.7}\cdot\frac{3.5}{2.5}=1.4\cdot\frac{5.4}{20.7}=1.4\cdot\frac{6}{23}=\frac75\cdot\frac{6}{23}\)

\(=\frac{42}{115}\)

 321,30 x 21,37 = 6 866,181 nka

6866,181 bạn kiểm tra lại kết quả nha