9.9×6.970 10.7210.72÷3.2
6.34÷0.16.34×0.1 3.36÷0.1233.6÷1.2
0.6×0.8=48 1.6×0.9=144
2.02×1.8=3636 30.6×4=1224
× × 2 ÷1
÷ ÷ 2 1÷
1.59÷5.3=15.9÷
16.2÷(48.6+5.4)×0.5
2.4×16.5÷0.6
0.36÷[(6.1-4.6)×0.8]
345.67÷0.25÷4