4.4A - Add and subtract whole numbers and decimals

Front

What is addition?

Back

Addition is the process of finding the total or sum by combining two or more numbers.

Front

What is subtraction?

Back

Subtraction is the process of finding the difference between two numbers by taking one number away from another.

Front

What is a whole number?

Back

A whole number is a number without fractions or decimals; it is a non-negative integer (0, 1, 2, 3, ...).

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 (e.g., 0.5, 2.75).

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.

Front

How do you subtract decimals?

Back

To subtract decimals, align the numbers by the decimal point and subtract as you would whole numbers, placing the decimal point in the difference.

Front

What is the sum of 22.50, 14.75, and 8.50?

Back

The sum is 45.75.

Front

If you have 6.95 lbs of jelly beans and 1.75 lbs are cherry flavor, how do you find the lime flavor?

Back

Subtract the cherry flavor from the total: 6.95 - 1.75 = 5.20 lbs of lime flavor.

Front

How do you calculate change from a purchase?

Back

To calculate change, subtract the cost of the item from the amount given to the cashier.

Front

If a notebook costs $2.45, a package of pencils costs $3.79, and an eraser costs $1.55, how do you find the total cost?

Back

Add the costs together: 2.45 + 3.79 + 1.55 = 7.79.