220k views
2 votes
Can someone please help

calculate the given expressions
199 - 199
-67 - -67
21 + -21
do i add and subtract normally

2 Answers

2 votes
yep, subtracting a negative is like adding. and the others are normal, adding a negative is like subtracting.
User Manishie
by
8.2k points
4 votes
199-199=0
-67 - -67= 0
21 + -21= 0

I'm thinking that's how it goes.
User Piotr Olaszewski
by
7.8k points

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