8/30 Adding, Subtracting, & Multiplying Decimals

Front

What is the sum of $15.38, $6.25, and $12.04?

Back

$33.67

Front

How do you calculate sales tax on an item that costs $132.50 with a tax rate of 8%?

Back

Multiply $132.50 by 0.08 to get $10.60.

Front

If Ishi earns $8.50 per hour and works 20.88 hours, how much does he make before taxes?

Back

$177.48

Front

What is the difference in miles if Roberto hikes 21.48 miles one weekend and 30 miles the next?

Back

8.52 miles less.

Front

How do you find the difference in practice time if Madison practices 5.75 hours one week and 4.2 hours the next?

Back

The difference is 1.55 hours.

Front

What is the process for adding decimals?

Back

Align the decimal points and add as you would whole numbers.

Front

What is the process for subtracting decimals?

Back

Align the decimal points and subtract as you would whole numbers.

Front

How do you multiply decimals?

Back

Multiply as whole numbers, then count the total number of decimal places in both factors to place the decimal in the product.

Front

What is a decimal?

Back

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

Front

What does it mean to round a decimal?

Back

To round a decimal means to reduce the number of digits after the decimal point to make it simpler while keeping its value close.