# 3. Fill in the blanks.  (a) (– 8) + _____ = 0  (b) 13 + _____ = 0  (c) 12 + (– 12) = ____  (d) (– 4) + ____ = – 12   (e) ____ – 15 = – 10

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

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

(c) 12 + (– 12) = ____
Since we know that,  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

B )  13

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