Operations with Decimals

Front

What is a decimal?

Back

A decimal is a fraction expressed in a special form, where the denominator is a power of ten, represented with a decimal point.

Front

How do you add decimals?

Back

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

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

How do you divide decimals?

Back

To divide decimals, move the decimal point in the divisor to the right until it is a whole number, then move the decimal point in the dividend the same number of places and divide as usual.

Front

What is the value of 1.4 pounds of steak at $4.50 per pound?

Back

$6.30

Front

If Sophia has 7.9 apples and divides them equally with a friend, how many apples does each get?

Back

3.95 apples

Front

What is the total cost of 4.6 meters of fabric at $3.57 per meter?

Back

$16.42

Front

How much longer is a 3-inch ribbon compared to a 2.6-inch ribbon?

Back

0.4 inches

Front

What is the total cost of 4.2 kg of apples at $0.60 per kg?

Back

$2.52