Multiply Decimals by Whole Numbers

Front

What is multiplication?

Back

Multiplication is a mathematical operation that represents the repeated addition of a number. For example, 3 multiplied by 4 (3 x 4) means adding 3 four times (3 + 3 + 3 + 3).

Front

What is a decimal?

Back

A decimal is a fraction expressed in a special form. It uses a decimal point to separate the whole number part from the fractional part. For example, 0.75 is a decimal.

Front

How do you multiply a decimal by a whole number?

Back

To multiply a decimal by a whole number, multiply as if there were no decimal, then place the decimal point in the product based on the number of decimal places in the original decimal.

Front

Estimate the product of 0.5 and 8.

Back

The estimated product is 4, because 0.5 is close to 1/2, and 1/2 of 8 is 4.

Front

What is the product of 0.25 and 8?

Back

The product is 2.00.

Front

If a stamp costs $0.37, how much do 100 stamps cost?

Back

100 stamps cost $37.00.

Front

What is the best estimate of 1.95 gallons over 26 weeks?

Back

The best estimate is 52 gallons.

Front

How do you round a decimal to the nearest whole number?

Back

To round a decimal to the nearest whole number, look at the digit to the right of the decimal point. If it's 5 or more, round up; if it's less than 5, round down.

Front

What is the equation for multiplying a decimal by a whole number?

Back

The equation is: Whole Number x Decimal = Product.

Front

If each model car is 3.25 inches long, how long are 10 cars?

Back

10 cars are 32.5 inches long.