计算:(1)(-10)+15;(2)(-0.9)+(-3.6);(3)0+(-4.5);(4)15-(-7);(5)(-2.7)-(+2.3);(6)13-14;(7)18+(-12)+(-21)+(

题目简介

计算:(1)(-10)+15;(2)(-0.9)+(-3.6);(3)0+(-4.5);(4)15-(-7);(5)(-2.7)-(+2.3);(6)13-14;(7)18+(-12)+(-21)+(

题目详情

计算:
(1)(-10)+15;
(2)(-0.9)+(-3.6);
(3)0+(-4.5);
(4)15-(-7);
(5)(-2.7)-(+2.3);
(6)
1
3
-
1
4

(7)18+(-12)+(-21)+(+12);
(8)0.35+(-0.6)+0.25+(-5.4);
(9)-26+43-24+13-46;
(10)(-3
3
7
)+12.5+(-16
4
7
)+(-2.5)
题型:解答题难度:中档来源:不详

答案

(1)(-10)+15=5;

(2)(-0.9)+(-3.6)=-4.5;

(3)0+(-4.5)=-4.5;

(4)15-(-7)=15+7=22;

(5)(-2.7)-(+2.3)=-2.7-2.3=-5;

(6)class="stub"1
3
-class="stub"1
4
=class="stub"1
12


(7)18+(-12)+(-21)+(+12)=18-12-21+12=18-21=-3;

(8)0.35+(-0.6)+0.25+(-5.4)=0.6-6=-5.4;

(9)-26+43-24+13-46=-96+56=-40;

(10)(-3class="stub"3
7
)+12.5+(-16class="stub"4
7
)+(-2.5)
=-20+10=-10.

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