Question

Tính nhanh:

A.38/40x50/57                         B.35/32x27/20+35/32x5/20

Answer 1

a: =38/57x40/50=2/3x4/5=8/15

b: =35/32(27/20+5/20)=35/32x32/20=35/20=7/4

Answer 2

a, `5/6`          b, `7/4`

Answer 3

8/15

7

Answer 4

a

\(\text{= 38/57 x 40/50}\)

\(\text{= 2/3 x 4/5}\)

\(\text{= 8/15}\)

 

b

\(\text{ = 35/32 x ( 27/20 + 5/20 )}\)

\(\text{= 35/32 x 32/20}\)

\(\text{= 35/20}\)

\(\text{= 7/4}\)