18-3=
16-4=
8+7=
7+5+4=
19-7=
10+8=
6+9=
15-5-4=
2+9=
15+5=
14+3=
17-4+6=
11-3=
4+5=
7+2=
8+4=
7+7=
7-3=
8-6=
8-8=
11-1=
9-7=
6-5=
17+2= 15-9= 5+7= 9-1+3=
19-6= 8-2= 8+4= 16-2+4=
16+4= 20-2= 6+7= 4+8-3=
11-4= 12-5= 8+3= 14+2-3=
17-3-7= 13+3-10= 11-4+6= 10-4+11=
0+1= 5﹣3= 4+1=
1+1= 4﹣3= 2+1=
3+1= 3﹣3= 4﹣0=
2018 8+67+6 15-38+3 5+715-2
5.4÷0.09= 7.75+3.86-7.75+1.14= 2.5×0.99×0.4=
26.2+38= 40×0.1÷0.001= 56.27- 3.73-46.27=