Question

Consider the expression shown.

(
3.2
×
10
−
4
)
−
(
4.5
×
10
−
5
)

What is the result of the subtraction in scientific form?


-1.3×
10
−
9


-1.3×
10
−
10


2.75×
10
−
4


2.75×
10
−
5

Answer 1

3.2×10⁻⁴ − 4.5×10⁻⁵ = 3.2×10⁻⁴ − 0.45×10⁻⁴ = (3.2 − 0.45)×10⁻⁴ = 2.75×10⁻⁴

Answer: 2.75×10⁻⁴.