A-A+
计算(1)(-4)-(8)-(-5)+(-9);(2)(-5)×(-7)-5×(-6)(3)
问题详情
计算
(1)(-4)-(8)-(-5)+(-9);
(2)(-5)×(-7)-5×(-6)
(3)(-9)÷
(4)(1-
(5)3+50÷(-2)2×(-
参考答案
(1)原式=-4-8+5-9
=-12+5-9
=-7-9
=-16;
(2)原式=35+30
=65;
(3)原式=(-9)×23×23×(-14)
=(-6)×23×(-14)
=(-4)×(-14)
=1;
(4)原式=1×(-12)-12×(-12)-13×(-12)
=-12+6+4
=-2;
(5)原式=3+50÷4×(-15)-1
=3+50×14×(-15)-1
=3+252×(-15)-1
=3-52-1
=-12.
考点: