1÷ ×7=
1﹣1÷9=
0.75+ =
7÷0.01=
9π=
﹣ ×0=
1﹣0.22=
1÷50%=
12.6﹣1.7=
2.1× =
480÷60= 3.72+6.28= +×1=
235+99= ﹣= 12×÷12×=
145+398= 6-0.6= 0.24×50= 3﹣3÷7= (+)×56=
1.25×6×8= = = ÷0.75= ×4÷×4=
0.5÷5%= 0.75× = 2+3%= 3a×4a=