27×(-23)+(-15)×23-9×23.
题型:解答题难度:一般来源:不详
答案
原式=-18+(-10)-6 =-18+(-10)+(-6) =-34. |
举一反三
25×(-4)=______,(-0.125)×(-8)=______. |
填空: (1)5×(-4)=______;(2)(-6)×4=______;(3)(-7)×(-1)=______; (4)(-5)×0=______;(5)×(-)=______;(6)(-)×(-)=______; (7)(-3)×(-)=______. |
计算: (1)(-2)××(-)×(-);(2)(-6)×5×(-)×; (3)(-4)×7×(-1)×(-0.25);(4)(-)××(-)× |
计算: (1)49×(-5);(2)(-8)×(-7.2)×(-2.5)×; (3)-7.8×(-8.1)×0×|-19.6|;(4)-|-0.25|×(-5)×4×(-). |
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