2.3 Mental Strategies for Subtraction

Unit Objectives

• We are learning to explore and choose appropriate mental subtraction strategies such as the compensation strategy and rounding to solve subtraction problems.

Success Criteria

• I can round numbers and use the compensation strategy to solve subtraction problems.

• I can use rounding to check answers and count on to solve subtraction problems.

• I can use subtraction strategies to solve word problems.

Learning Objective

• To use compensation of an addend to solve subtraction problems. 

Success Criteria

• I can round the addend to the nearest 10.

• I can subtract using the 10's number.

• I can compensate to solve the equation.

Compensate: to make up for something lost,
missing, or broken, or to pay someone for their work.

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