题目内容

(1)-33×(-2)+42÷(-2)3÷10-|-22|÷5;
(2)(-22)÷(-2÷
1
2
)-|-3|×(-1)2013
(3)(-56)+(-12+8)+(-2)×5+21;
(4)(1.2+1.3)2×[(-2)2×
1
4
]2012÷
1
8
×0.52
(1)-33×(-2)+42÷(-2)3÷10-|-22|÷5
=-27×(-2)+16÷(-8)÷10-4÷5
=54-0.2-0.8
=53;

(2)(-22)÷(-2÷
1
2
)-|-3|×(-1)2013
=-4÷(-4)-3×(-1)
=1+3
=4;

(3)(-56)+(-12+8)+(-2)×5+21
=-56-4-10+21
=-70+21
=-49;

(4)(1.2+1.3)2×[(-2)2×
1
4
]2012÷
1
8
×0.52
=2.52×[4×
1
4
]2012÷
1
8
×0.25
=2.52×1×8×0.25
=6.25×2
=12.5.
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