计算:(1)(-23)+(-12)(2)1+(-2)+|-3|-5(3)(-4)×2×(-0.25)(4)(512+23-34)×(-12)-数学

题目简介

计算:(1)(-23)+(-12)(2)1+(-2)+|-3|-5(3)(-4)×2×(-0.25)(4)(512+23-34)×(-12)-数学

题目详情

计算:
(1)(-23)+(-12)
(2)1+(-2)+|-3|-5
(3)(-4)×2×(-0.25)
(4)(
5
12
+
2
3
-
3
4
)×(-12)
题型:解答题难度:中档来源:不详

答案

(1)(-23)+(-12)=-35;
(2)1+(-2)+|-3|-5=1-2+3-5=-3;
(3)(-4)×2×(-0.25)=4×2×0.25=2;
(4)(class="stub"5
12
+class="stub"2
3
-class="stub"3
4
)×(-12)

=class="stub"5
12
×(-12)+class="stub"2
3
×(-12)-class="stub"3
4
×(-12)

=-5-8+9
=-4.

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