2.3 Mental Strategies for Subtraction

Unit Objectives

• We are learning to explore and choose appropriate written subtraction strategies such as split and vertical algorithm to solve subtraction problems.

Success Criteria

• I can use the split strategy to solve subtraction problems.

• I can use the vertical strategy to solve subtraction problems.

• I can choose strategy to solve subtraction word problems.

Learning Objective

• To use the split strategy of a subtrahend to solve subtraction problems. 

Success Criteria

• I can split 4-digit numbers into their place values.

• I can use place values to subtract from the larger number.

Follow along to write notes to help you remember what you've learned.

LI: I can use the split strategy to solve subtraction problems.

Worked Example with a number line.

Guided Practice

Learning Objective

• To use vertical algorithm to solve subtraction problems.

Success Criteria

• I can set up equations in vertical format.

• I can use trading to change the values of digit to able to subract.

Interactive Tool