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计算:(1)-7+13-6+20;(2)(-49)-(+91)-(-5)+(-9);(3)(-5)×6+(-125)÷(-5);(4)1+(-2)+|-2-3|-5;(5)8+2×32-(-2×3)2(6)-12008×[(-2)5-32-514÷(−17)]-2.5.
题目详情
计算:
(1)-7+13-6+20;
(2)(-49)-(+91)-(-5)+(-9);
(3)(-5)×6+(-125)÷(-5);
(4)1+(-2)+|-2-3|-5;
(5)8+2×32-(-2×3)2
(6)-12008×[(-2)5-32-
÷(−
)]-2.5.
22
200852
÷(−
)]-2.5.
5 5 14 14
1 1 7 7
(1)-7+13-6+20;
(2)(-49)-(+91)-(-5)+(-9);
(3)(-5)×6+(-125)÷(-5);
(4)1+(-2)+|-2-3|-5;
(5)8+2×32-(-2×3)2
(6)-12008×[(-2)5-32-
5 |
14 |
1 |
7 |
22
200852
5 |
14 |
1 |
7 |
5 |
14 |
1 |
7 |
▼优质解答
答案和解析
(1)-7+13-6+20,
=-7-6+13+20,
=-13+13+20,
=20;
(2)(-49)-(+91)-(-5)+(-9),
=-49-91+5-9,
=-149+5,
=-144;
(3)(-5)×6+(-125)÷(-5),
=-30+25,
=-5;
(4)1+(-2)+|-2-3|-5,
=1-2+5-5,
=-1;
(5)8+2×322-(-2×3)22,
=8+18-36,
=26-36,
=-10;
(6)-120082008×[(-2)55-322-
÷(−
)]-2.5,
=-1×(-32-9+
×7)-2.5,
=-(-41+
)-2.5,
=41-2.5-2.5,
=36.
5 5 514 14 14÷(−
1 1 17 7 7)]-2.5,
=-1×(-32-9+
×7)-2.5,
=-(-41+
)-2.5,
=41-2.5-2.5,
=36.
5 5 514 14 14×7)-2.5,
=-(-41+
)-2.5,
=41-2.5-2.5,
=36.
5 5 52 2 2)-2.5,
=41-2.5-2.5,
=36.
=-7-6+13+20,
=-13+13+20,
=20;
(2)(-49)-(+91)-(-5)+(-9),
=-49-91+5-9,
=-149+5,
=-144;
(3)(-5)×6+(-125)÷(-5),
=-30+25,
=-5;
(4)1+(-2)+|-2-3|-5,
=1-2+5-5,
=-1;
(5)8+2×322-(-2×3)22,
=8+18-36,
=26-36,
=-10;
(6)-120082008×[(-2)55-322-
5 |
14 |
1 |
7 |
=-1×(-32-9+
5 |
14 |
=-(-41+
5 |
2 |
=41-2.5-2.5,
=36.
5 |
14 |
1 |
7 |
=-1×(-32-9+
5 |
14 |
=-(-41+
5 |
2 |
=41-2.5-2.5,
=36.
5 |
14 |
=-(-41+
5 |
2 |
=41-2.5-2.5,
=36.
5 |
2 |
=41-2.5-2.5,
=36.
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