Question

Work out ( 4 × 10 6 ) × ( 2 × 10 7 ) Give your answer in standard form.

Answer 1

So I'm pretty sure I solved a similar question before, but we always write the equation first.

So, equation:

(4 × 10^6) × (2 × 10^7)

Again, we will use the order of operations.

() - Parenthesis

^x - Exponents

×/÷ - Multiplication/Division

+/- - Addition/Subtraction

Now, solve the parenthesis. We have two parentheses, so we will solve those separately.

(4 × 10^6)= 4 × 1,000,000 = 4,000,000

(2 × 10^7)= 2 × 10,000,000 = 20,000,000

Now, multiply these two together.

4,000,000 × 20,000,000 = 80000000000000

BUT, we can simplify this. So, the real answer is:

8 × 10^13

Answer 2

4 * 2 = 8

10^6 * 10^7 = 10^(6 + 7) = 10^13

Answer is 8 * 10^13