NAME ______________________________ DATE _______________

DAILY PRACTICE

Closest Estimate

Each problem below has a choice of three estimates. Which one do you think is closest? Choose the closest estimate without solving the problem. Circle it. Then write about why you think this estimate is the closest.

  • 1 The closest estimate for 83 × 29 is: 2,000 2,400 2,800

    I think this is the closest because:

  • 2 The closest estimate for 69 × 38 is: 1,800 2,200 2,600

    I think this is the closest because:

  • 3 The closest estimate for 26 × 211 is: 4,500 5,000 5,500

    I think this is the closest because:

  • 4 The closest estimate for 496 × 18 is: 900 9,000 90,000

    I think this is the closest because:

  • 5 Choose one or more of the problems above and, on a separate sheet of paper, solve it to get an exact answer. Show your solutions with equations. Did you choose the closest estimates?

NOTE

Students practice strategies for estimating products. Then they find one or more exact products and compare them to their estimates.

MWI Multiplication Strategies


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Table of Contents

Investigations 3 in Number, Data, and Space®, Student Activity Book Unit 1 Puzzles, Clusters, and Towers Unit 2 Prisms and Solids Unit 3 Rectangles, Clocks, and Tracks Unit 4 How Many People and Teams? Unit 5 Temperature, Height, and Growth Unit 6 Between 0 and 1 Unit 7 Races, Arrays, and Grids Unit 8 Properties of Polygons