what are compatible numbers in 83 plus 34?

2 Answers

• compatible numbers are numbers that are easy to add or subtract, multiply or divide

  your supposed to like 90 to an easy number such as 80 + 30

  then add

  80 + 30=110

  then add the numbers you left out

  3+ 4 = 7

  and you get 117

  or you can round up

  90 + 40

  90 + 40=130

  then you subtract the numbers you added on

  90 - 83 = 7

  40 - 34 = 6

  then you add those and subtract from 130 and you get 117

  I had to do these two years ago in 6th grade they are way to easy for me GOOD LUCK and don't rely on yahoo for answers what happens when their is a test?

• What Is A Compatible Number

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