3/14×2/3+1/6=3x2/(14x3) +1/6【第一项进行约分】=1/7 +1/6【通分】=(6+7)/42=13/42
=2/14+1/6=1/7+1/6=13/42
3/14*2/3+1/6=1/7+1/6=6/42+7/42=13/42
3/14×2/3+1/6=3/3×2/14+1/6=1/7+1/6=6/42+7/42=13/42
3/14×2/3+1/6=1/7+1/6=(6+7)/6×7=13/42