IXL | Multiply decimals and whole numbers: word problems

A factory makes 6.8 gallons of lemonade per minute. How many gallons of lemonade will the factory make in 8 minutes?

gallons

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Learn with an example

question

Lee's science class places weights on a scale during an experiment. Each weight weighs 3.8 kilograms. If the class puts 5 weights on the scale at the same time, what will the scale read?

kilograms

solution

Multiply the weight of each weight by the number of weights.

Multiply as you would multiply whole numbers.


	3.8

×	5

190

Count the number of decimal places in the factors. There is 1 decimal place in 3.8. Move the decimal point 1 place to the left in the answer.

190. → 19.0

The scale will read 19 kilograms.

Looking for more? Try these:

Lesson: Multiplying decimals by whole numbers

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Work it out

Not feeling ready yet? These can help:

CC.7Multiply a decimal by a multi-digit whole number

D.13Multiply by 2-digit numbers: word problems

Lesson: Multiplying decimals by whole numbers

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