4元5角=角 9元+3元6角=元角
22条
9条
28条
6769 93-3100 46+854 79-969
53+9= 85-30= 33-6= 26+4=
92-40= 41+10= 84-8= 32+7=
25+6= 30+54= 42-5= 52-50=
34-7+20= 52-6-3= 69+(9-2)= 86-(20+50)=
15-=7 9+=14 42-8=
89-=82 +20=28 -50 =4
+=+
+-=