Theory
How do you multiply a decimal number by 10, 100, or 1000?
Multiplying by 10, 100, or 1000 makes a decimal number larger.
When multiplying by 10, the decimal point moves one place to the right. When multiplying by 100, it moves two places, and when multiplying by 1000, three places.
If you run out of places, add zeros.
- Move the decimal point to the rightWhen multiplying by 10, 100, or 1000, the decimal point moves to the right.
You use multiplication with equal groups.
A × B means that you take the same amount B, A times.Instead of adding again and again, you calculate the product all at once.
Calculate 3,47 × 10.
- Move the decimal point to the right3,47 × 10 = 34,7.