Question

8 Dê o valor das expressões numéricas:
a-) 3/4×(2/5+1/2)
b-) 2/3×3/5+7/8
c-) 2-(3/5×7/8)
d-) 3×(5/4-3/8)​

Answer 1

Oi...

Dê o valor das expressões numéricas:

a)

3/4 × (2/5 + 1/2)

3/4 × (4 + 5/10)

3/4 × 9/10

27/40

b)

2/3 × 3/5 + 7/8

2 × 1/5 + 7/8

2/5 +7/8⇒mmc = 40

16/40 + 35/40

51/40

c)

2 - (3/5 × 7/8)

2 - 21/40⇒mmc = 40

80/40 - 21/40

59/40

d)

3 × (5/4 - 3/8)

​3 × (10 - 3/8)

3 × 7/8

21/8

Espero ter ajudado.