Question

Tinh bang hai cach:

a. (1/3 + 1/5) x 1/2               b. (1/3 - 1/5) x 1/2

giup minh voi, tra loi minh tick cho nha

Answer 1

a.\(=\dfrac{8}{15}\times\dfrac{1}{2}=\dfrac{4}{15}\)

b.\(=\dfrac{1}{3}\times\dfrac{1}{2}-\dfrac{1}{5}\times\dfrac{1}{2}=\dfrac{1}{6}-\dfrac{1}{10}=\dfrac{1}{15}\)

Answer 2

a.(1/3+1/5) x 1/2

=8/15 x 1/2=8/30=4/15

b)(1/3-1/5) x 1/2=2/15 x 1/2=1/15