3.5*0.8+5.5*80%+4/5簡便運算

3.5*0.8+5.5*80%+4/5簡便運算

4/5×3.5+5.5×8O%+0.8
=0.8×3.5+5.5×0.8+0.8
=0.8×(3.5+5.5+1)
=0.8×10
=8