Question

\(\dfrac{3}{20}\)x\(\dfrac{7}{16}\)+\(\dfrac{3}{20}\)x\(\dfrac{5}{16}\)+\(\dfrac{3}{20}\)\(\dfrac{3}{10}\)

Answer 1

Quy đồng

Answer 2

tính 1 cách thuận tiện

=)

Answer 3

Answer 4

=3/20 x (7/16 + 5/16 + 3/10)

=3/20 x (35/80 + 25/80 + 24/80)

=3/20 x 21/20

=63/400