23+34=
56+23=
78-4=
80+20=
56+13=
79-34=
99+3=
63-34=
12-6= 13-8= 8+3= 15-4=
9+2= 16-7= 12-9= 11-8=
11-4= 18-8= 14-5= 17-6=
15-8= 17-10= 2+7= 14-9=
9+2= 16-9= 13-4-5=
15-5= 6+8= 11-3+4=
13-6= 12-7= 12-4-8=
16-8= 14-8= 18-9-0=
4+8= 13-5= 11-8+7
12﹣7= 59﹣50= 8+20= 17﹣8= 30+8=
63﹣3= 78﹣70= 11﹣5= 57﹣50= 16﹣9=
40+6= 36﹣30= 11﹣9+50= 68﹣8+2= 15﹣6+30=
十位
个位
①( ﹣ )×24
②0.36×99+0.36
③20.8﹣(9.6+0.125÷12.5%)
④( ﹣ ÷2)×
⑤2.5×16×12.5
⑥0.5÷[ ﹣( ﹣ )]
8.4-5.6= 1.25×0.08= ÷8=
4÷0.2= 50×4%= 7× ÷7× =