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计算题:(1)(-49)-(+91)-(-5)+(-9);(2)(−516)÷(−730)×(−631);(3)1+(-2)+|-2-3|-5;(4)(-5)×(-7)-5×(-6);(5)(512+23−34)×(−12);(6)-7×(-227)+19×(-227)-5×(-227)
题目详情
计算题:
(1)(-49)-(+91)-(-5)+(-9);
(2)(−5
)÷(−
)×(−
);
(3)1+(-2)+|-2-3|-5;
(4)(-5)×(-7)-5×(-6);
(5)(
+
−
)×(−12);
(6)-7×(-
)+19×(-
)-5×(-
)
(1)(-49)-(+91)-(-5)+(-9);
(2)(−5
1 |
6 |
7 |
30 |
6 |
31 |
(3)1+(-2)+|-2-3|-5;
(4)(-5)×(-7)-5×(-6);
(5)(
5 |
12 |
2 |
3 |
3 |
4 |
(6)-7×(-
22 |
7 |
22 |
7 |
22 |
7 |
▼优质解答
答案和解析
(1)(-49)-(+91)-(-5)+(-9)
=-49-91+5-9
=-144;
(2)(−5
)÷(−
)×(−
)
=-
×(-
)×(-
)
=-
;
(3)1+(-2)+|-2-3|-5
=1-2+5-5
=-1;
(4)(-5)×(-7)-5×(-6)
=35+30
=65;
(5)(
+
−
)×(−12)
=-5-8+9
=-4;
(6)-7×(-
)+19×(-
)-5×(-
)
=(-7+19-5)×(-
)
=-22.
=-49-91+5-9
=-144;
(2)(−5
1 |
6 |
7 |
30 |
6 |
31 |
=-
31 |
6 |
30 |
7 |
6 |
31 |
=-
30 |
7 |
(3)1+(-2)+|-2-3|-5
=1-2+5-5
=-1;
(4)(-5)×(-7)-5×(-6)
=35+30
=65;
(5)(
5 |
12 |
2 |
3 |
3 |
4 |
=-5-8+9
=-4;
(6)-7×(-
22 |
7 |
22 |
7 |
22 |
7 |
=(-7+19-5)×(-
22 |
7 |
=-22.
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