Question

Calcule
A)3/5+7/9-
B)1/5-7/8-
C)8/7+3/11-
D)13/15-12/5-
E)5/8+3/15-

Por favor me ajudem

Answer 1

A)3/5( multiplica por 9 em cima e em baixo) + 7/9 (x5) = 27/45 + 35/45 = 62/45

B)1/5(x8) - 7/8 (x5) = 8/40 - 56/40 = -48/40

C)8/7(x11) + 3/11(x7) = 88/77 + 21/77 = 109/77

D)13/15 - 12/5(x3) = 3/15 - 36/15 = -21/15

E)5/8(x15) + 3/15(x8) = 75/120 + 24/120 = 99/120