Unit 3 Math Test Review - estimation and problem solving

What is a reasonable estimate for the sum of 3,723 and 8,716? Show your thinking on your whiteboard to justify your answer.

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Three students estimated the following problem. Choose the expression that DOES NOT have a use a helpful estimation strategy.

6,867 - 904

• 6,900 - 900

• 7,000 - 1,000

• 7,000 - 904

Write the equation for the sum of Model 1 & Model 2.

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Which statement is correct?

• 54 x 9 is more than 540

• 54 x 9 is less than 540

• 54 x 9 is equal to 540

• 54 x 9 is between 600 and 650

Calculate: 10,000 – 1,486 =

Calculate: 3,575 + 743 =

Estimate: 2.74 – 0.816 =

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Solve: 2.74 – 0.816 =

518 x 3 =

27 x 34 =