145+9 7-3+610+0 8-6+55+3
10-54 9-68-6+6 4+42+8-3
4+1= 5-2= 3+4= 2+2=
5-5= 8+0= 7-4= 9-3=
8-7= 7+2= 9-6= 4-1=
2+3= 4+3= 5+2= 6-5=
10﹣6.8= ﹣ = 35×1%= 1.25×24= 5× ÷5× =
0.42= 10÷0.02= 5a×7a= 1÷3= 1﹣1÷6=