IXL | Multiply and divide positive rational numbers: word problems

A wall made of 6 concrete blocks weighed 25.5 kilograms. How much did each block weigh?

kilograms

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Learn with an example

question

Miss Bowman bought a block of cheddar cheese. The block weighed 6 2/3 pounds. She cut the block up into 6 equal pieces. What was the weight of each piece of cheese?

Write your answer as a fraction or as a whole or mixed number.

pounds

key idea

Write mixed numbers and whole numbers as improper fractions. Multiply by the reciprocal of the divisor.

solution

Divide the total amount of cheese by the number of pieces.

Write

as an improper fraction:

(6 × 3) + 2

Write

as an improper fraction:

Turn this from a division problem into a multiplication problem by multiplying by the reciprocal.

Cancel common factors, then multiply.

10 × 1

3 × 3

Simplify the answer.

Each piece of cheese weighed 1 1/9 pounds.

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Lesson: Multiplying and dividing rational numbers

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Lesson: Multiplying and dividing rational numbers

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