Decimals

Adding and Subtracting Decimals

Add: 28.5 + 44.47 + 3075.6		Subtract: 380.53 - 75
	Step 1: Line up the decimal points. Step 2: Then add or subtract.

Multiplying Decimals

Multiply 1.89 x 5.03 =

Step 1: Multiply the decimals as you would do with whole

Step 2: Then count the number of spaces of each factor being multiplied. Decimal places are the number of spaces to the right of the decimal point, There is 2 in the top factor and two in the bottom factor, so the decimal is placed 4 spaces from the right.

Step 3: Show the total number of places in your answer.

Dividing a Decimal by a Whole Number

Example:

Place the decimal point directly above its position in the problem. Then divide the same way as you divide whole numbers.

Dividing a Decimal by a Decimal Number

Example: 4.374 .03 =

Move the decimal point of the divisor (outside the bracket) as far right as you can go. Then move the decimal point in the dividend (inside the bracket) the same number of places as the divisor.

Place the decimal point directly above its position in the problem. Then divide the same way as divide whole numbers.