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Melissa Hedges, Math Teaching Specialist,
Beth Schefelker, Mathematics Teaching Specialist, [email protected]
The Milwaukee Mathematics Partnership (MMP) is supported with funding from the National Science Foundation.
Make an estimate. Keep track of how you got your estimate.
Share your strategy.
Note the mathematical understandings you needed to make this estimate?What Was Your Method?
What if the estimate was 6000?
Where did this estimate come from?
Was it a good approach?
How should it be adjusted?
Why might someone select 150 instead of 140?A Different Approach…What is happening here?
Estimation requires good mental arithmetic skills which come from an understanding of the nature of the operations, a firm understanding of place value, and the ability to use various properties.
Bassarear, T. Mathematics for Elementary School Teachers. 2nd Edition. Houghton Mifflin Company.
5,210 + 298 ≈ 5,400 5,500 7,000 8,000
59 x 11≈ 60 500 600 6,000
268 ÷ 9.9 ≈ 25 250 2.5 2,500
87 x 52
3,482 ÷ 7
0.1 1 10 100 1000
Solve 259 ÷ 24
Adding It Up, 2001
____ ____ x ____