Question

heeelp!

Answer 1

Explicação passo-a-passo:

3 . { [ (2/3 - 4/5). 15/8] + 4/9 ÷ 2/3}=

3 . { [ (10 - 4 ) . 15/8 ] + 4/9 ÷ 2/3}=

____

15

3 . {[ 6/15 . 15/8] + 4/9 ÷ 2/3}=

3 . { 6/8 + 4/9 ÷ 2/3}=

3 . { 3/4 + 4/9× 3/2}=

3 . { 3/4 + 12/18}=

3 . { 3/4 + 2/3 }=

3 . { 9 + 8 } =

____

12

3 . { 17/12}=

51/12=

51 ÷ 3

______=

12 ÷ 3

17/4