Who is correct chris or sam

Mathematics

2 answers:

Nastasia [14]3 years ago

7 0

The answer is Lacey :)

Advocard [28]3 years ago

4 0

Lacey, because you have to do the opposite when you want to get rid of a number. She subtracted 20 because it was originally positive 20. Chris messed up and did not do the opposite, subtraction, and instead he added 20

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