(1)2.5-(-7.5)(2)(-0.8)×(-2)(3)(-3)×(-5)-60÷(-2)(4)(25-115+56)×(-30)(5)-4+(1-0.2÷35)×(-3)(6)-13-(1-0.

题目简介

(1)2.5-(-7.5)(2)(-0.8)×(-2)(3)(-3)×(-5)-60÷(-2)(4)(25-115+56)×(-30)(5)-4+(1-0.2÷35)×(-3)(6)-13-(1-0.

题目详情

(1)2.5-(-7.5)
(2)(-0.8)×(-2)
(3)(-3)×(-5)-60÷(-2)
(4)(
2
5
-
1
15
+
5
6
)×(-30)
(5)-4+(1-0.2÷
3
5
)×(-3)
(6)-13-(1-0.5)×
1
3
×[4-(-3)2].
题型:解答题难度:中档来源:不详

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-class="stub"1
5
×class="stub"5
3
)×(-3)=-4-3+1=-6;
(6)原式=-1-class="stub"1
2
×class="stub"1
3
×(4-9)=-1+1=0.

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