Rich tasks for this chapter - page 53

• These are open-ended problem solving questions that require students to investigate adding and subtracting using written methods. The tasks can be given at the start of a topic and done as the students gain enough knowledge to complete them, inserted into a topic at an appropriate place, or given as homework, or extension.

1. 6174 is called Kaprekar’s number
2. Mental or written or calculator?

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Adding using written methods - page 54

• Understand how to record, in an efficient way, a place value method of adding two numbers.
• Use a written method to find the answers to addition problems.

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Subtracting using written methods - page 58

• Understand how to record, in an efficient way, a place value method of subtracting two numbers.
• Use a written method to find the answers to subtraction problems.

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Adding and subtracting by choosing a strategy - page 61

• Decide whether it is most efficient to use a mental or written method to solve addition and subtraction problems.

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