1800﹣799=
560÷8×7=
6.4+9.6﹣12=
8×125%=
×1.5=
(1﹣ )×16=
×24÷ =
3.25×4=
1÷ ×7=
1﹣1÷9=
0.75+ =
7÷0.01=
9π=
﹣ ×0=
1﹣0.22=
1÷50%=
12.6﹣1.7=
2.1× =
5.63-3= 0.5× = +0.75= 3.6÷60%=
4× ÷4× = 0.22= 0.25×16= 0.1+99×0.1=
0.5÷5%= 0.75× = 2+3%= 3a×4a=