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How to Multiply by 100


As 100 = 10 10, multiplying by 100 is the same as multiplying by 10 twice. That means you move the point two places to the right.

Rule

When you multiply a number by 100, you move the point in the number two places to the right.

Bootcamps

Want to watch animated videos and solve interactive exercises about multiplication by powers of ten? Click here to try Bootcamps!

If the number you are multiplying by 100 isn’t a decimal number, you have to remember that there’s an invisible point after the last digit. By moving that point two places to the right, you get two empty places. In both of these places you can put a 0.

4 times 100 equals 400 shown as a leap on the number line

The trick of moving the decimal point when multiplying by 100, is similar to a trick you can use when dividing by 100.

Example 1

Multiplying By 100

a)
61 100 = 6100
b)
763.4 100 = 76340
c)
20 100 = 2000
d)
0.4 100 = 40
e)
65 100 = 6500
f)
36.98 100 = 3698
g)
71 100 = 7100
h)
0.04 100 = 4

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How to Multiply by 10
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How to Multiply by 1000