Subtract 6.4×10⁶ -2×10⁵. Describe the process of rewriting the numbers in this problem with the same power of 10.

Question

6.4×10⁶ -2×10⁵ =
Use scientific notation

Answer 1

To rewrite the numbers with the same power of 10, we need to convert both numbers to the same power of 10.

6.4×10⁶ can be rewritten as 64×10⁵, because dividing the exponent 6 by 10 gives us 5 and multiplying the coefficient 6.4 by 10 gives us 64.

So the problem becomes:
64×10⁵ - 2×10⁵

Now that both numbers have the same power of 10, we can subtract the coefficients:
64 - 2 = 62

Therefore, the answer is:
62×10⁵ or 6.2×10⁶