Rounding to the Nearest 10 or 100 Using Compatible Numbers
T.I.P.S.
Students must be able to slightly adjust numbers by rounding, use compatible numbers to determine an estimate or approximate solution to addition and subtraction problems.
Example
Benito’s family is planning a trip in which they will visit several cities. Benito was asked to estimate how many miles they will travel from start to finish, based on the following mileage chart. What is a good estimate for the total miles driven?
Digital Tools
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Resources
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3.4 Number and operations. The student applies mathematical process standards to develop and use strategies and methods for whole number computations in order to solve problems with efficiency and accuracy. The student is expected to:(B) round to the nearest 10 or 100 or use compatible numbers to estimate solutions to addition and subtraction problems
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