计算(写出计算过程).(1)(-3.14)+(+4.96)+(+2.14)+(-7.96)(2)(-218)+(+5)+(-312)+(+1.125)+(+412)(3)(-3.2)×1.5(4)134×(-8)(5)(-4)×13×(-25)×(-6).(6)24×(18-16-14)(7-数学
题文
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×(
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答案
(1)(-3.14)+(+4.96)+(+2.14)+(-7.96) =-3.14+2.14+4.96-7.96 =-1-3 =-4; (2)(-2
=-2.125+1.125-3.5+4.5+5 =-1+1+5 =5; (3)(-3.2)×1.5 =-4.8; (4)1
=-22; (5)(-4)×
=-4×
=-200; (6)24×(
=24×
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