Question

Efetue as operações abaixo:
a) 3 x 10-2
+ 5,4 x 10-1
b) 3 x 10-2
x 5,4 x 10-1
c) 3 x 104
x (-5,4 x 10-1
)

d) 7 x 10-5
÷ 3,5 x 103
e) 3 x 104
÷ 4 x 10-1
f) 10-2
x 3,1416 x 103

Answer 1

A) 3 x 10 - 2 + 5,4 x 10 - 1 = (30 - 2)+(51 - 1) = 78
B) 3 x 10 - 2 x 5,4 x 10 - 1 = 30 - 108 - 1 = -79
C) (3 x 104)x (5,4 x 10 -1) = 312 x 54 - 1= 16847
D) (7 x 10 -5) \ (3,5 x 103) = 70 -5 x 7/2 x 103= 70- 1030/7 = -540/7
E) 3 x 104 / 4 x 10 -1 = 780 -1 = 779
F) 10 -2 x 3,1416 x 103= 10 -647,1696 = -637,1696