1.6×0.25=
4.8×100=
3.45÷0.01=
0.22=
3.5×0.2=
9+3.1=
2-0.88=
a-0.12a=
9.86+13.84 18.5-4.68
3.08×1.9≈(得数保留两位小数) ★8.82÷2.8
67.58-(17.58+4.32) 1.25×2.5×(4×0.8)
7.6×3.4+6.6×7.6 4.2÷[(5.92-4.52)×0.2]
⑴4.9×0.54.9 ⑵3.4÷0.013.4×100 ⑶2.25×1.52.25÷1.5