This quiz addresses the requirements of the National Curriculum KS1 Maths and Numeracy for children aged 6 and 7 in year 2. Specifically this quiz is aimed at the section dealing with adding in a different order.
In Year 2, children are encouraged to check their addition calculations. They might do this by adding the numbers up again, but in a different order. For example, if they add up 6 + 9 + 4, they may check it by recognising that 6 + 4 makes 10, and 9 more is 19, or they may do it differently by adding 4 + 9 to make 13 then adding 6 to give 19. This is called the commutative property and means that addition calculations can be done in any order to achieve the same answer.
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You can find more about this topic by visiting BBC Bitesize - Adding and subtracting
Starting at 3 and counting on 22 would take longer than swapping the order of the numbers around!
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Adding the 2 and 8 first gives 10, which is easily added to 30
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Spotting the bond to 20 makes this calculation become much easier
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Adding the smaller numbers first and then adding them to 60 is the best option
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Starting at 85 and counting on 4 is perfectly acceptable
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Starting at 10 and counting up in 5s, or adding up all the 5s and then 10 more are both good strategies
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Adding together all the tens and then the units and combining the two totals is a useful way of solving this
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Recognising that there are two pairs of bonds to 20 makes it much easier to solve this
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Adding the 1 to the 34 gives 35. 35 + 35 = 70
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Counting up in tens from 43 and finally adding the 2 makes this calculation easy
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