计算:(1)(-5)+(-9)+(+3)(2)|-3|+(-2)-4(3)(-5.5)+(-3.2)-(-2.5)-4.8(4)-24+3.2-1
计算:(1)(-5)+(-9)+(+3)(2)|-3|+(-2)-4(3)(-5.5)+(-3.2)-(-2.5)-4.8(4)-24+3.2-16-3.5+0.3(5)...
计算:(1)(-5)+(-9)+(+3)(2)|-3|+(-2)-4(3)(-5.5)+(-3.2)-(-2.5)-4.8(4)-24+3.2-16-3.5+0.3(5)0?2123+(+314)?(?23)?(+0.25).
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(1)(-5)+(-9)+(+3)
=-14+3
=-11;
(2)|-3|+(-2)-4
=3-2-4
=-3;
(3)(-5.5)+(-3.2)-(-2.5)-4.8
=-5.5-3.2-4.8+2.5
=-13.5+2.5
=-11;
(4)-24+3.2-16-3.5+0.3
=-24-16-3.5+3.2+0.3
=-40;
(5)0?21
+(+3
)?(?
)?(+0.25)
=(-21
+
)+(-0.25+3
)
=-21+3
=-18.
=-14+3
=-11;
(2)|-3|+(-2)-4
=3-2-4
=-3;
(3)(-5.5)+(-3.2)-(-2.5)-4.8
=-5.5-3.2-4.8+2.5
=-13.5+2.5
=-11;
(4)-24+3.2-16-3.5+0.3
=-24-16-3.5+3.2+0.3
=-40;
(5)0?21
2 |
3 |
1 |
4 |
2 |
3 |
=(-21
2 |
3 |
2 |
3 |
1 |
4 |
=-21+3
=-18.
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