Show how to make one addend the next tens number. 22+49=?

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03-12-2017
Mathematics

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Show how to make one addend the next tens number. 22+49=?

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W0lf93 W0lf93 · Answer 1 · 2017-12-15T21:58:50+01:00

W0lf93 W0lf93

15-12-2017

The one addend technique is the act of breaking up numbers to make even tens. 22+49 can be broken up into 21+49+1 and then added to make 21+50 and then these numbers can be more easily added to make 71.

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