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timama [110]
3 years ago
6

Describe how you can use the make a ten strategy to find the sum 7+9

Mathematics
1 answer:
kondor19780726 [428]3 years ago
3 0
I don't quite understand the ten strategy, or what EXACTLY you're asking. But, what you can do is when you add a one digit number plus a nine, just change the nine to a ten and subtract one. It is very easy. So, 7+10 equals 17, subtract one and you get 16 which is 7+9. It is always one less than anything plus 10.
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