IXL | Multiply and divide rational numbers: word problems

A boat traveled at a constant speed for 5 hours, covering a total distance of 33 kilometers. How fast was it going?

Write your answer as a decimal.

kilometers per hour

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Learn with an example

question

Currently, a construction company can dig 7.8 meters per hour, but a new tool would let the company dig 3 times as fast. How fast would the company be able to dig with the new tool?

meters per hour

solution

Multiply the current rate of digging by 3.

Multiply as you would multiply whole numbers.


	7.8

×	3

234

Count the number of decimal places in the factors. There is 1 decimal place in 7.8. Move the decimal point 1 place to the left in the answer.

234. → 23.4

With the new tool, the construction company would be able to dig 23.4 meters per day.

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Lesson: Multiplying and dividing rational numbers

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B.9Multiply and divide rational numbers

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G.10Multiply fractions and mixed numbers: word problems

Lesson: Multiplying and dividing rational numbers

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