Decimal Review NBT.7

A decimal is a number that includes a decimal point, which separates the whole number part from the fractional part. For example, 3.14 is a decimal.

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.

The value of the digit in the tenths place in 4.56 is 5, which represents 5 tenths or 0.5.

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.

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

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

$254.28

$17.43

$582.88

$327.38