(-12又2/3)除以1.4-(-8又1/3)除以(-1.4)+9又1/3除以1.4=?

问题描述:

(-12又2/3)除以1.4-(-8又1/3)除以(-1.4)+9又1/3除以1.4=?

(-12又2/3)除以1.4-(-8又1/3)除以(-1.4)+9又1/3除以1.4
=(-12又2/3)×10/14-(-8又1/3)×10/14+9又1/3×10/14
=10/14×((-12又2/3+8又1/3+9又1/3)
=5/7×7
=5