zoe1020 zoe1020
  • 12-10-2018
  • Mathematics
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Homework & practice 3-4 mental math

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mrworldwide
mrworldwide mrworldwide
  • 12-10-2018

3-4=-1. To use mental math, imagine that there is a number line in your head. Start at three, and since we're subtracting, move to the left 4 units. This will land you at -1. I hope this gets easier for you in the future!

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