
计算:(1)(+3)-(-2);(2)(-1)-(+2);(3)0-(-3);(4)1-5;(5)(-23)-(-12);(6)
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...
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).
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(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)
-(-
),
=
+
,
=
;
(8)(-
)-(-
),
=-
+
,
=
.
=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)
2 |
3 |
1 |
2 |
=
2 |
3 |
1 |
2 |
=
7 |
6 |
(8)(-
1 |
6 |
1 |
2 |
=-
1 |
6 |
1 |
2 |
=
1 |
3 |
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