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OMA Answer these quick fire questions on your mini whiteboards.
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Learning Objective Multiply any integer by 10, 100 and 1000.
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Discuss the following numbers…
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What is the relationship between these numbers?
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What number is missing in the sequence?
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What happens when we multiply 19 by 10? It looks like we add a zero, but really all the numbers move one place along the grid to the left.
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Now multiply by 100…. Now multiply by 1000…
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Miss Newton and Mrs Byrne: Nh7 pg 35 Miss Todd: Abacus pg 6 and 5 (Q1) YOUR TASK!
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OMA Mental Maths
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Learning Objective Multiply any integer by 10, 100 and 1000 in the context of money.
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12000 How can I multiply this number by 10? 100? 1000?
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12000 What if I wanted to divide this number by 10? 100? 1000?
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4.5 How can I multiply this number by 10? 100? 1000?
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4.5 What if I wanted to divide this number by 10? 100? 1000?
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Now try these…
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Miss Newton– Nh7 pg 9 Mrs Byrne and Miss Todd – Abacus pg 7 YOUR TASK!
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OMA Mental Maths
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27000 What if I wanted to divide this number by 10? 100? 1000?
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Jo’s shelf is 126cm long. She wants to put 10 boxes on this shelf. How much space will she have for each box?
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Henri has scored 5923 runs in cricket over 100 matches. How many runs has he scored on average in each match?
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Now try these…
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Miss Newton: Abacus Page 7 Mrs Byrne: Nh7 pg 39 Miss Todd: 0.2 x ? x ? / ? = 0.2.Discuss. Write own calculations which begin and end in the same number. Over to you!
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OMA Mental Maths
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Learning Objective Multiply using the grid method including decimals.
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STARTING OFF X809 100 20 3 89 x 123 First partition each number like this.
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Where everything goes… X809 100 20 3 Now times where the arrows meet (where the dots are). 8000 1600 240 900 180 27
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Totalling X809 100 8000 900 20 1600 180 3 240 27 = 10947 Now total up all the circled numbers. = = 267 8900 1780 +
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Now try these…
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Now for some decimals…
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Over to you!
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OMA Mental Maths
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Learning Objective Multiply using the grid method including decimals.
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CLICK ON ME!
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STARTING OFF X40.3 6 0.2 4.3 x 6.2 First partition each number like this.
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Where everything goes… X40.3 6 0.2 Now times where the arrows meet (where the dots are). 24 0.8 1.2 0.06
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Totalling = Now total up all the circled numbers. = = 25.8 0.86 + X40.3 6 0.2 24 0.8 1.8 0.06
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Now try these…
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Over to you!
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