初一数学书46页习题2.8的知识技能第一题计算怎么做,
2019-06-02
初一数学书46页习题2.8的知识技能第一题计算怎么做,
优质解答
1.1/3-1/5-1+2/3=(1/3+2/3)-1-1/5=1-1-1/5=-1/5
2.0.5-1/4-2.75+1/2=(0.5+1/2)-(1/4+2.75)=1-3=-2
3.-2/3-1/6+1/4-1/2=-8/12-2/12+3/12-6/12=-13/12
4.27-18+（-7）-32=(27-7)-(18+32)=-30
1.1/3-1/5-1+2/3=(1/3+2/3)-1-1/5=1-1-1/5=-1/5
2.0.5-1/4-2.75+1/2=(0.5+1/2)-(1/4+2.75)=1-3=-2
3.-2/3-1/6+1/4-1/2=-8/12-2/12+3/12-6/12=-13/12
4.27-18+（-7）-32=(27-7)-(18+32)=-30