166+34=
301-99=
75÷100=
1700÷25÷4=
134×0=
7×7÷7×7=
10×0.08=
3.25×1000=
2.9÷100=
4.5÷100×1000=
1.581.85 0.83×0.250.83 9.68×1.59.68