Question

Calcule:

a) 9/40 + 8/20 + 8/30

b) 9/8 + -3/3 + 8/20​


ME AJUDEM TENHO PROVA HOJE

Answer 1

Oi....

a)

9/40 + 8/20 + 8/30

9/40 + 2/5 + 4/15 ⇒o mmc de (40,5,15) = 120

27/120 + 48/120 + 32/120

107/120

b)

9/8 + ( - 3/3) + 8/20

9/8 + ( - 1) + 8/20

9/8 - 1 + 2/5⇒o mmc de (8,1,5) = 40

45 - 40 + 16/40

61 - 40/40

21/40

Espero ter ajudado.