Câu hỏi của Amie Trần

Question

Tính bằng cách thuận tiện nhất

7/10 + 2/6 + 8/12 + 6/20

Ngọc An · Accepted Answer

$\dfrac{7}{10}+\dfrac{2}{6}+\dfrac{8}{12}+\dfrac{6}{20}$

$=\left(\dfrac{7}{10}+\dfrac{6}{20}\right)+\left(\dfrac{2}{6}+\dfrac{8}{12}\right)$

$=\left(\dfrac{14}{20}+\dfrac{6}{20}\right)+\left(\dfrac{4}{12}+\dfrac{8}{12}\right)$

$=1+1$

$=2$Câu trả lời: $\dfrac{7}{10}+\dfrac{2}{6}+\dfrac{8}{12}+\dfrac{6}{20}$

$=\left(\dfrac{7}{10}+\dfrac{6}{20}\right)+\left(\dfrac{2}{6}+\dfrac{8}{12}\right)$

$=\left(\dfrac{14}{20}+\dfrac{6}{20}\right)+\left(\dfrac{4}{12}+\dfrac{8}{12}\right)$

$=1+1$

$=2$

Phạm Ngọc Linh · Answer

7/10 + 2/6 + 8/12 + 6/20

= (7/10 + 6/20) + (2/6 + 8/12)

= 1 + 1

= 2.Câu trả lời:   7/10 + 2/6 + 8/12 + 6/20

= (7/10 + 6/20) + (2/6 + 8/12)

= 1 + 1

= 2.

36 $\times$ 56	=	56 $\times$
8 $\times$ 6	=	8 $\times$ 6