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2 December, 02:24

Explain how you could add 678 + 303 using mental math

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  1. 2 December, 02:25
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    Add the hundreds first then the tenths then the units. so add 600 + 300 which is 900 then 70 + 0 which is 70 then 8+3 which is 11 then add them all up which is 981.
  2. 2 December, 02:48
    0
    Okay well I do it like this. 3+8=11. I put a 1 down and carry the other. so I do 7+0+1=8 so now I have 81, and last I do 6+3=9. so the answer would be 981.

    Have a nice day!
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