Question

Divide mentally. 8.4 ÷ 4,000 = ? A. 0.021 B. 0.0021 C. 0.00021 D. 0.000021 please explaine fully cuz i dont know help hurry

Answer 1

it's B, and being mental won' help when having a calculator next to you) It's B for sure!!!

Answer 2

Let's go over it shall we:
8.4 / 4,000

1. first you have to move the decimal point over so that it becomes a whole number. *Hint: however many times you move the decimal point on the outside you do the same on the inside. For example:

2. Once you do that it becomes extremely easy. Next, you just solve it like a regular division problem.

3. The answer is B. 0.0021

Hope I helped ;)