Question

calcule as expressões
(3+1/2)×4/5
(0,75+1/4)÷2/5+1/2​

Answer 1

• (3 + 1/2) × 4/5 =

= 12/5 + 4/10 =

= (24 + 4)/10 =

= 28/10 =

= 2,8

• (0,75 + 1/4) ÷ 2/5 + 1/2 =

= (3/4 + 1/4) ÷ 2/5 + 1/2 =

= 4/4 ÷ 2/5 + 1/2 =

= 4/4 × 5/2 + 1/2 =

= 20/8 + 1/2 =

= (20 + 4)/8 =

= 24/8 =

= 3

Espero ter ajudado!