1. (2024一下·杭州期末) 我会算

14-9=	11-3=	98-80=	( )-7=18
89-80+6=	88-9=	31+5=	50+20=
9+( )=15	94-6-50=	12+50=	63+30=
8+37=	80=85-( )	35+(60-20)=	97-90=
43-6=	62-5=	10=( )-50	56-(5+35)=