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D1.1 Mental multiplication and division methods

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1 D1.1 Mental multiplication and division methods
1 of 4 © Boardworks Ltd 2012

2 Function machine – finding the input

3 Fill in the gaps 1) × 7 = 168 24 2) 6 × = 336 56 168 ÷ 7 = 24 336 ÷ 6 = 56 3) 435 ÷ = 5 87 4) ÷ 9 = 15 135 435 ÷ 5 = 87 15 × 9 = 135 5) × 1·2 = 24 20 6) 3·2 ÷ = 0∙8 4 24 ÷ 1·2 = 20 3·2 ÷ 0·8 = 4 7) 7 × = 4∙9 0·7 8) ÷ 0·5 = 874 437 4·9 ÷ 7 = 0·7 874 × 0·5 = 437

4 Using multiplication facts to divide
4·2 ÷ 7 = ? 0∙6 What multiplication fact would help us to solve this problem? 7 × 6 = 42 so 7 × 0·6 = 4·2


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