Question

Me ajudem por favor. Com a conta.

Answer 1

Resposta:

a) (-4/5) × 5/8 - 2×(-5/4)

- 20/40 + 10/4

- 1/2 + 5/2

4/2 = 2

b) 8/5×(-1/4)+6/4

-8/20 + 6/4

- 2/5 + 3/2

(-4 + 15)/10 = 11/10

c) 144/100 × 10/24 + 18/100× (-10/12)

1440/2400 - 180/1200

144/240 - 18/120

72/120 - 18/120 = 54/120

=27/60 = 9/20