计算题(1)(-4)-(-1)+(-6)÷2(2)-3-[-2-(-8)×(-0.125)](3)-2 5 ÷(-4)×( 1 2
计算题(1)(-4)-(-1)+(-6)÷2(2)-3-[-2-(-8)×(-0.125)](3)-25÷(-4)×(12)2-12×(-15+24)3(4)[-718-...
计算题(1)(-4)-(-1)+(-6)÷2(2)-3-[-2-(-8)×(-0.125)](3)-2 5 ÷(-4)×( 1 2 ) 2 -12×(-15+ 2 4 ) 3 (4) [- 7 18 - 5 12 + 1 6 -(- 2 9 )]÷( 5 36 ) .
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世长兴3R
2014-12-17
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(1)原式=-4+1-3 =-6;
(2)原式=-3-(-2-1) =-3+3 =0;
(3) - 2 5 ÷(-4)×( ) 2 -12×(-15+ 2 4 ) 3 = -32÷(-4)× -12×(-15+16 ) 3 = -32×(- )× -12×(-15+16 ) 3 =2-12 =-10;
(4) [- - + -(- )]÷( ) = (- - + + )÷( ) = (- - + + )×( ) = - × - × + × + × = - -3+ + = (- + + )-3 =-3. |
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