simplify the following (6*2=12)
i. -34+12-(-21)+1
ii. 55-90+12-(34) 4+(-4)-12
iii. 22+34-78-89-90
iv. (- 7) + (- 9) + (+ 4) + (+ 3)
v. (- 5) + (-2)
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Answer:
a).
b).
c).
d).
e).
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