3. Fill in the blanks.

  (a) (– 8) + _____ = 0

  (b) 13 + _____ = 0

  (c) 12 + (– 12) = ____

  (d) (– 4) + ____ = – 12 

  (e) ____ – 15 = – 10

Answers (4)

a) (– 8) + _____ = 0
Since we know that, -a +a =0. Therefore, the blank space should be + 8.

 (b) 13 + _____ = 0
The sum is zero. Therefore it should be additive inverse of 13. \Rightarrow -13( is the answer)

 (c) 12 + (– 12) = ____
Since we know that, -a +a =0 So, the answer is Zero (0)

(d) (– 4) + ____ = – 12
The integer in blank space should be -8 

(e) ____ – 15 = – 10
The integer in blank space should be +5 

-13

0

8

5

----_15 =-10

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