Rich tasks for this chapter - page 109

• These are problem solving open-ended questions that require students to investigate multiplying and dividing. 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. Napier's bones

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Multiplying by changing the order - page 110

• Know that if you change the order of the numbers in a multiplication sentence the answer doesn't change.
• Solve problems by changing the order of the numbers in a multiplication.

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Multiplication strategies - page 111

• Solve multiplication problems by splitting one of the numbers.
• Solve multiplication problems by taking some off or adding some on to known facts.
• Use doubling to solve multiplication problems.

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Division strategies - page 115

• Solve division problems using multiplication.
• Solve division problems using halving for dividing by 2, 4 and 8.

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Multiplying and dividing by choosing a strategy - page 118

• Choose an efficient strategy to solve multiplication and division problems.

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