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14 March, 23:05

Two different ways to find the difference for 12-3

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  1. 14 March, 23:16
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    First, you could count from 3 up to 12 and record the number between them. Second, you could use mental math and try to figure out mentally. The answer is 12-3 = 9
  2. 14 March, 23:19
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    You can either ask "How much is left when you take 3 away from 12?", or you can ask "How far apart are the numbers 12 and 3 on the number line?"

    Another way you could think about it is "what number do I have to add to 3 to get to 12?"
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