Decimal Operations

Front

What is a decimal?

Back

A decimal is a fraction whose denominator is a power of ten, represented with a dot (decimal point) to separate the whole number from the fractional part.

Front

How do you add decimals?

Back

To add decimals, align the numbers by the decimal point and add as you would whole numbers, placing the decimal point in the sum directly below the other decimal points.

Front

What is the result of 1.4 x 4.5?

Back

The result is 6.30.

Front

How do you subtract decimals?

Back

To subtract decimals, align the numbers by the decimal point and subtract as you would whole numbers, placing the decimal point in the difference directly below the other decimal points.

Front

What is the value of 4 x 0.03?

Back

The value is 0.12.

Front

What happens to the decimal point when you multiply by 10?

Back

When you multiply by 10, the decimal point moves one place to the right.

Front

What happens to the decimal point when you divide by 10?

Back

When you divide by 10, the decimal point moves one place to the left.

Front

What is the result of 94 - 4.8?

Back

The result is 89.2.

Front

What is the result of 55.78 + 4.6?

Back

The result is 60.38.

Front

What is the rule for moving the decimal in division?

Back

The decimal moves the same amount in the dividend that it moved in the divisor.