"四十除以零点四"...四十除以零点四
"四十点九除以四点零"...四十点九除以四点零
"四十除以零点四五等于几"...四十除以零点四五等于几
"四十除以0.45"...四十除以0.45
"四十点五除以90等于几"...四十点五除以90等于几
"四十点七除以零点九"...四十点七除以零点九
"四十除以0.625"...四十除以0.625
"四十除以0.25"...四十除以0.25
"四十点三除以十"...四十点三除以十
"40.91除以四十"...40.91除以四十