A-A+
(1)2.5-(-7.5)(2)(-0.8)×(-2)(3)(-3)×(-5)-60÷(-2
问题详情
(1)2.5-(-7.5)
(2)(-0.8)×(-2)
(3)(-3)×(-5)-60÷(-2)
(4)(
(5)-4+(1-0.2÷
(6)-13-(1-0.5)×
参考答案
(1)原式=2.5+7.5=10;
(2)原式=1.6;
(3)原式=15+30=45;
(4)原式=-12+2-25=-35;
(5)原式=-4+(1-15×53)×(-3)=-4-3+1=-6;
(6)原式=-1-12×13×(4-9)=-1+1=0.
考点: