15−(−5)+1?1 15-(-5)+1?1 15−(−5)+1?1
Making use of the following rule:
−(−x)=+ -(-x)=+ −(−x)=+
Let's rewrite the given exercise in its proper form:
15+(5)+1= 15+(5)+1= 15+(5)+1=
And solve accordingly:
20+1=21 20+1=21 20+1=21
Since 21 is greater than 1, the appropriate sign is:
21 > 1
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