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**Answer** by Maria Droujkova , Make math your own, to make your own math
·
Feb 02, 2016 at 11:06 PM

Can you explain the source of your question? Is it from a textbook? What kinds of problems do you solve with that "make 10 method"?

Best Answer

**Answer** by Andi
·
Feb 02, 2016 at 11:29 PM

Here is an example of my 6-yr olds homework:

Make 10 to help you find the missing number: 5 = 12 - __; __ - 6 = 8; 15 - __ = 7 Write a story problem for 15 - 6. Show how to make 10 to solve the problem. Then complete the equation 15 - 6 = __

To the best of my knowledge, the idea is to count to 10 and then to your goal number. For most (not all) people it's easier this way. For example:

5 = 12 - ?

Think: what to subtract to get to 10? 2

Once you are at 10, what do you subtract to get to 5? 5

So together, you subtract 2 and 5, that is, 7.

A lot of people think that way when they count on fingers, count out money for change, or solve these problems in their head.

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? - 6 = 8

What's 6 more than 8?

9, 10 - we counted 2 so far to get to 10. There are 4 more left from that 6. That gives you 14.

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The best thing here is to try doing these on your fingers. Then you'll see where 10 come in handy (oh, horrible pun).

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