题目
计算
(1)
(2)
(-2.25)-( )+( )-(-0.125)
(3)
-32+( )2×( )
(4)
答案: 解:原式=(-24)×(-34)+(-24)×56+(-24)×(-78) =18-20+21 =19;
解:原式= (-214)- ( +58 )+( −34 ) - (-18) =(-214)+( −34 )- ( +58 )- (-18) =-3-12 =-72;
解:原式=-9+254×( −425 ) =-9-1 =-10;
解:原式=2-2+3+2-1 =2+3-1-2+2 =4.