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23-09-2016
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what is 36+28 using mental math strategies

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Аноним Аноним

23-09-2016

Round up both numbers, 40+30=70

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23-09-2016

+36
28

add 6 and 8 which makes 14
now leave the 4 behind and add 3 +2 which gives you 5, now finally add 1 more
which gives you 64

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