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(1)(+12)-(-18)+(-7)-(+15)(2)-22×7-(-3)×6+5(3)(-1)2012×[(-2)5-32-514÷(-17)](4)-5m2n+4mn2-2mn+6m2n+3mn.

题目详情
(1)(+12)-(-18)+(-7)-(+15)
(2)-2 2 ×7-(-3)×6+5
(3)(-1) 2012 ×[(-2) 5 -3 2 -
5
14
÷( -
1
7
)]
(4)-5m 2 n+4mn 2 -2mn+6m 2 n+3mn.
(1)(+12)-(-18)+(-7)-(+15)
(2)-2 2 ×7-(-3)×6+5
(3)(-1) 2012 ×[(-2) 5 -3 2 -
5
14
÷( -
1
7
)]
(4)-5m 2 n+4mn 2 -2mn+6m 2 n+3mn.
(1)(+12)-(-18)+(-7)-(+15)
(2)-2 2 ×7-(-3)×6+5
(3)(-1) 2012 ×[(-2) 5 -3 2 -
5
14
÷( -
1
7
)]
(4)-5m 2 n+4mn 2 -2mn+6m 2 n+3mn.
(1)(+12)-(-18)+(-7)-(+15)
(2)-2 2 ×7-(-3)×6+5
(3)(-1) 2012 ×[(-2) 5 -3 2 -
5
14
÷( -
1
7
)]
(4)-5m 2 n+4mn 2 -2mn+6m 2 n+3mn.
(1)(+12)-(-18)+(-7)-(+15)
(2)-2 2 ×7-(-3)×6+5
(3)(-1) 2012 ×[(-2) 5 -3 2 -
5
14
÷( -
1
7
)]
(4)-5m 2 n+4mn 2 -2mn+6m 2 n+3mn.

2
2012 5 2
5
14
÷( -
1
7
)]
(4)-5m 2 n+4mn 2 -2mn+6m 2 n+3mn.
5
14
5 14 5 5 14 14 -
1
7
)]
(4)-5m 2 n+4mn 2 -2mn+6m 2 n+3mn.
1
7
1 7 1 1 7 7
2 2 2
▼优质解答
答案和解析
(1)原式=12+18-7-15=30-22=8;
(2)原式=-4×7+18+5=-28+18+5=-5;
(3)原式=1×(-32-9+
5
14
×7)=-38.5;
(4)原式=m 2 n+4mn 2 +mn.
(1)原式=12+18-7-15=30-22=8;
(2)原式=-4×7+18+5=-28+18+5=-5;
(3)原式=1×(-32-9+
5
14
×7)=-38.5;
(4)原式=m 2 n+4mn 2 +mn.
(1)原式=12+18-7-15=30-22=8;
(2)原式=-4×7+18+5=-28+18+5=-5;
(3)原式=1×(-32-9+
5
14
×7)=-38.5;
(4)原式=m 2 n+4mn 2 +mn.
(1)原式=12+18-7-15=30-22=8;
(2)原式=-4×7+18+5=-28+18+5=-5;
(3)原式=1×(-32-9+
5
14
×7)=-38.5;
(4)原式=m 2 n+4mn 2 +mn.
(1)原式=12+18-7-15=30-22=8;
(2)原式=-4×7+18+5=-28+18+5=-5;
(3)原式=1×(-32-9+
5
14
×7)=-38.5;
(4)原式=m 2 n+4mn 2 +mn.
5
14
5 14 5 5 5 14 14 14 ×7)=-38.5;
(4)原式=m 2 2 n+4mn 2 2 +mn.