Using Multiplication Strategies
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Using Multiplication Strategies Solve the following problems in your head using the double and halve strategy or the trebling and thirding strategy. eg. 4x75= 3x18= 2x150=300 9x6=54 Show what you did in your head in the box. 14x6 3x18 86x50 24x5 16x3 Solve the following problems in your head using a little bit more / a little bit less. Show what you did in your head in the box. 4x28= (4x30) – (4x2)= 120 - 8= 112
5x20=100 so what does 5x19=
5x21=
6x50=300 so what does 6x49=
6x51=
7x200= 1400 so what does 7x198=
7x202=
Solve the following problems in your head using a part / whole strategy Show what you did in your head in the box. eg. 6x28= (6x20) + (6x8)= 120 + 48 = 168 3x57= 6x38= 4x97= 3x256= 6x546=
5x20=100 so what does 5x19=
5x21=
6x50=300 so what does 6x49=
6x51=
7x200= 1400 so what does 7x198=
7x202=
Solve the following problems in your head using a part / whole strategy Show what you did in your head in the box. eg. 6x28= (6x20) + (6x8)= 120 + 48 = 168 3x57= 6x38= 4x97= 3x256= 6x546=
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