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Published byJason Leonard Modified over 9 years ago
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LET ME COUNT THE WAYS Multiplication
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Use What you Know 8 x 6 = ? If you can’t remember the answer to 8 x 6, then use a fact you do know. Such as 8 x 5 8 x 5 = 40 then just add another 8 40 +8 = 48 So 8 x 6 = 48
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Use What you Know 4 x 7 = ? If you can’t remember the answer to 4 x 7, then use a fact you do know. Such as 2 x 7 2 x 7 = 14 14 + 14 = 28 So 4 x 7 = 28
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Repeated Addition Ms Burton bought some candy. She bought each of her three friends five pieces of candy. How many pieces of candy did she buy? 5 + 5 + 5 = 15
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Array Models Mrs Milan bakes cupcakes. She bakes her four children two cupcakes each. How many cupcakes does she bake? 4 x 2 = 8
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25 x 18 Array Models
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Box Method 200 + 40 + 3 50 + 6 243 x 56 10,0002000150 240181,200 11,200 + 2,240 + 168 = 13,608 x
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Decomposition 243 x 56 (200 + 40 + 3) x (50 + 6) 200 x 50 = 10,000 200 x 6 = 1,200 40 x 50 = 2,000 40 x 6 = 240 3 x 50 = 150 3 x 6 = 18 10,00 0 1,20 0 2,00 0 24 0 15 0 +1 8 13,608
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Partial Products x 6 3 3 5 0 1 8 0 + 1 0 0 0 1 5 9 3 5 9 7 2
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