Question

giúp mình gấp nha bài 4 ế

 

Answer 1

4:

a: =18/35

b: =5*12/7=60/7

c: =21*2/7=42/7=6

Answer 2

\(4/\)

\(a,\dfrac{3}{5}\times\dfrac{6}{7}=\dfrac{3\times6}{5\times7}=\dfrac{18}{35}\)

\(b,\dfrac{5}{7}\times12=\dfrac{5\times12}{7}=\dfrac{60}{7}\)

\(c,21\times\dfrac{2}{7}=\dfrac{21\times2}{7}=\dfrac{42}{7}=6\)