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2014-05-05T22:45:52+03:00
A)15+20-40=35-40=-5
b)-52-41-36=-129
c)-102 +62+40=-102+102=0
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2014-05-05T22:50:49+03:00
A)35 +(-40)=  -5       b)-93+(-36) = -129  c) -10+(-3) = -13 d) -40+40 =0
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