Any helpful hints on the make 10 method?
We can't teach our child the make 10 method because we don't get it either. Has anyone else had luck explaining it to a 6-yr old?
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).
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"?
