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(-8)+10+2+(-1)1+2-3-4+5-三分之二+(-六分之一)-(-四分之一)-二分之一-20+(-15)-(-17)-丨-12丨-四分之三+(-20.125)...
(-8)+10+2+(-1)
1+2-3-4+5
-三分之二+(-六分之一)-(-四分之一)-二分之一
-20+(-15)-(-17)-丨-12丨
-四分之三+(-20.125)-6.5+八分之一-(-0.75)
-5.29+3.1-(-1.8)+(-0.1)-9.87 展开
1+2-3-4+5
-三分之二+(-六分之一)-(-四分之一)-二分之一
-20+(-15)-(-17)-丨-12丨
-四分之三+(-20.125)-6.5+八分之一-(-0.75)
-5.29+3.1-(-1.8)+(-0.1)-9.87 展开
1个回答
展开全部
1、(-8)+10+2+(-1)
=-8+10+2-1
=3
2、1+2-3-4+5
=3-3-4+5
=0-4+5
=1
3、-2/3+(-1/6)-(-1/4)-1/2
=-4/6-1/6+1/4-2/4
=-5/6-1/4
=-10/12-3/12
=-13/12
4、-20+(-15)-(-17)-丨-12丨
=-20-15+17-12
=-35+17-12
=-30
5、-3/4+(-20.125)-6.5+1/8-(-0.75)
=-3/4-20.125-6.5+1/8+3/4
=-3/4+3/4-20.125+0.125-6.5
=0-20-6.5
=-26.5
6、-5.29+3.1-(-1.8)+(-0.1)-9.87
=-5.29+3.1+1.8-0.1-9.87
=-5.29-0.1+3.1+1.8-9.87
=-5.3+4.9-9.87
=-0.4-9.87
=-9.91
=-8+10+2-1
=3
2、1+2-3-4+5
=3-3-4+5
=0-4+5
=1
3、-2/3+(-1/6)-(-1/4)-1/2
=-4/6-1/6+1/4-2/4
=-5/6-1/4
=-10/12-3/12
=-13/12
4、-20+(-15)-(-17)-丨-12丨
=-20-15+17-12
=-35+17-12
=-30
5、-3/4+(-20.125)-6.5+1/8-(-0.75)
=-3/4-20.125-6.5+1/8+3/4
=-3/4+3/4-20.125+0.125-6.5
=0-20-6.5
=-26.5
6、-5.29+3.1-(-1.8)+(-0.1)-9.87
=-5.29+3.1+1.8-0.1-9.87
=-5.29-0.1+3.1+1.8-9.87
=-5.3+4.9-9.87
=-0.4-9.87
=-9.91
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