问题
解答题
(1)-33×(-2)+42÷(-2)3÷10-|-22|÷5; (2)(-22)÷(-2÷
(3)(-56)+(-12+8)+(-2)×5+21; (4)(1.2+1.3)2×[(-2)2×
|
答案
(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÷
)-|-3|×(-1)20131 2
=-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×
]2012÷1 4
×0.521 8
=2.52×[4×
]2012÷1 4
×0.251 8
=2.52×1×8×0.25
=6.25×2
=12.5.