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计算(写出计算过程).(1)(-3.14)+(4.96)+(2.14)+(-7.96)(2)
问题详情
计算(写出计算过程).
(1)(-3.14)+(4.96)+(2.14)+(-7.96)
(2)(-2
(3)(-3.2)×1.5
(4)1
(5)(-4)×
(6)24×(
(7)(
(8)-99
(9)2011×2
(10)-125÷(-25)-64÷(-4)
(11)2×(-3)2-5÷
(12)(-2)3×8-8×(
参考答案
(1)(-3.14)+(+4.96)+(+2.14)+(-7.96)
=-3.14+2.14+4.96-7.96
=-1-3
=-4;
(2)(-218)+(+5)+(-312)+(+1.125)+(+412)
=-2.125+1.125-3.5+4.5+5
=-1+1+5
=5;
(3)(-3.2)×1.5
=-4.8;
(4)134×(-8)
=-22;
(5)(-4)×13×(-25)×(-6)
=-4×13×25×6
=-200;
(6)24×(18-16-14)
=24×18-24×16-24×14
=3-4-6
=-7;
(7)(14-19-118-112)×(-36)
=14×(-36)-19×(-36)-118×(-36)-112×(-36)
=-9+4+2+3
=0;
(8)-999899×9
=(-100+199)×9
=-100×9+199×9
=-900+111
=-8991011;
(9)2011×213×0×(-389)
=0;
(10)-125÷(-25)-64÷(-4)
=5+16
=21;
(11)2×(-3)2-5÷12×2
=2×9-5×2×2
=18-20
=-2;
(12)(-2)3×8-8×(12)3+8÷18
=-8×8-8×18+8×8
=-64-1+64
=-1.
考点:过程