23+3+45=
56-32=
67+21=
6+35+52=
87-7=
66+5=
31+21+2=
78-23=
98-4+6=
55+45=
17+50＝ 57﹣30＝ 70+3＝ 11﹣8＝ 26+22＝
99﹣98＝ 30+50＝ 22+7＝ 67+4＝ 75﹣15＝
53+23= 86-43= 14+64= 76-16= 97-42= 34+54=
75-70= 58-6= 71-5= 20+45=
9+28= 60-50= 30+40= 42-7=
37-7= 76-56= 27+3= 49+11=
