Please help me with numbers 18-20 please

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asked Jan 6, 2017 139k views

1 Answer

Marius Retegan · Answer 1 · 2017-01-09T21:06:55+0000

The is answer is -2. With these problem you should do Keep Change Change. If you have done it like this the problem would look like this.
18+-20=
This would more easy because that all thing you need to know is adding negatives.

Please help me with numbers 18-20 please

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