Decimals Operations

Front

What is a decimal?

Back

A decimal is a fraction whose denominator is a power of ten, represented with a decimal point. For example, 0.5 is a decimal representation of 5/10.

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

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 result of subtracting a negative decimal from a positive decimal?

Back

Subtracting a negative decimal is the same as adding its positive equivalent. For example, 2.3 - (-5.6) = 2.3 + 5.6 = 7.9.

Front

How do you multiply decimals?

Back

To multiply decimals, multiply the numbers as if they were whole numbers, then count the total number of decimal places in both factors and place the decimal point in the product accordingly.

Front

What is the result of multiplying a decimal by 10?

Back

When you multiply a decimal by 10, you move the decimal point one place to the right. For example, 0.6 x 10 = 6.0.

Front

How do you divide decimals?

Back

To divide decimals, move the decimal point in the divisor to make it a whole number, and move the decimal point in the dividend the same number of places. Then divide as you would with whole numbers.

Front

What is the total of 3.5 and 2.7?

Back

3.5 + 2.7 = 6.2.

Front

If Luna has 5.8 apples and gives away 2.3, how many does she have left?

Back

5.8 - 2.3 = 3.5.

Front

What is the total cost if Aiden buys 4.2 kg of apples at $0.6 per kg?

Back

4.2 kg x $0.6/kg = $2.52.