（负十二又三分之二）除以一点四减负八又三分之一除以负一点四加十又三分之一除以一点四怎么计算?

Question

（负十二又三分之二）除以一点四减负八又三分之一除以负一点四加十又三分之一除以一点四 怎么计算?

Answer 1

(-12-2/3)÷1.4-(-8-1/3)÷1.4+(10+1/3)÷1.4
=(-12-2/3)÷1.4+(8+1/3)÷1.4+(10+1/3)÷1.4
=[(-12-2/3)+(8+1/3)+(10+1/3)]÷1.4
=[-12-2/3+8+1/3+10+1/3]÷1.4
=6÷1.4
=6÷7/5
=6×5/7
=30/7
=4+2/7
=4又2/7