计算:(1)(+3)-(-2);(2)(-1)-(+2);(3)0-(-3);(4)1-5;(5)(-23)-(-12);(6)(-1.3)-2.6;(7)23-(-12);(8)(-16)-(-12

题目简介

计算:(1)(+3)-(-2);(2)(-1)-(+2);(3)0-(-3);(4)1-5;(5)(-23)-(-12);(6)(-1.3)-2.6;(7)23-(-12);(8)(-16)-(-12

题目详情

计算:
(1)(+3)-(-2);
(2)(-1)-(+2);
(3)0-(-3);
(4)1-5;
(5)(-23)-(-12);
(6)(-1.3)-2.6;
(7)
2
3
-(-
1
2
);
(8)(-
1
6
)-(-
1
2
).
题型:解答题难度:中档来源:不详

答案

(1)(+3)-(-2),
=3+2,
=5;

(2)(-1)-(+2),
=-1-2,
=-3;

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

(4)1-5=-4;

(5)(-23)-(-12),
=-23+12,
=-11;

(6)(-1.3)-2.6,
=-1.3-2.6,
=-3.9;

(7)class="stub"2
3
-(-class="stub"1
2
),
=class="stub"2
3
+class="stub"1
2

=class="stub"7
6


(8)(-class="stub"1
6
)-(-class="stub"1
2
),
=-class="stub"1
6
+class="stub"1
2

=class="stub"1
3

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