Decimal Operations 5.3E, 5.3G, 5.3K

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 that represents 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

What is the process for subtracting decimals?

Back

To subtract decimals, align the numbers by the decimal point, subtract as you would whole numbers, and place 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

What is the rule for dividing 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 0.75 + 0.25?

Back

0.75 + 0.25 = 1.00.

Front

What is the difference between 621.6 and 587.32?

Back

621.6 - 587.32 = 34.28.

Front

If Preston spends $19.80 on four magazines, what is the cost of one magazine?

Back

$19.80 ÷ 4 = $4.95.

Front

What is the perimeter of a square if each side is 9.1 yards?

Back

Perimeter = 4 × side length = 4 × 9.1 = 36.4 yards.

Front

How many ounces of guacamole can Riley make with 6 avocados if each avocado makes 6.4 ounces?

Back

6 avocados × 6.4 ounces = 38.4 ounces.