Question

When dividing 918 by 4.2, what number should the divisor be multiplied by in order to make it a whole number?
1
10
100
1,000

Answer 1

To divide 918 by 4.2 so that the divisor becomes a whole number, we need to eliminate the decimal in 4.2.

We can do this by multiplying 4.2 by 10, which would shift the decimal place one position to the right, making it 42.

Here's how it works:

1. Start with the original division:
\[
\frac{918}{4.2}
\]

2. Multiply the divisor (4.2) by 10:
\[
4.2 \times 10 = 42
\]

3. To keep the equation balanced, we must also multiply the dividend (918) by the same factor:
\[
918 \times 10 = 9180
\]
So, the division now looks like this:
\[
\frac{9180}{42}
\]

This makes the divisor a whole number (42).

Thus, the divisor (4.2) should be multiplied by **10**.