一、口算。
0.86 - 0.6 = 75÷150 = 3.7 + 7.3 =
0.8÷0.04 = 1.8×300 = 1.2 - 0.9 =
0.7×80 = 8.7 + 0.29 = 12.5÷0.25 =
1 - 0.11 = 10.2÷3 = 12×2.5 =
0.34÷0.17 = 1.04 - 0.8 = 0.28 + 0.2 =
0.125×0.8 = 0.22 + 2.8 = 9.06 - 6.6 =
8.2×0.5 = 9.6÷3.2 = 0.96 + 2.94 =
2.63 + 0.47 = 0.63÷0.9 = 6.43 - 1.56 =
17.1 - 10.2 = 5.2×0.4 = 8.4÷0.21 =
3÷5 = 8.8 + 0.22 = 1.03×4 =

0.26 0.5 11
20 540 0.3
56 8.99 50
0.89 3.4 30
2 0.24 0.48
0.1 3.02 2.46
4.1 3 3.9
3.1 0.7 4.87
6.9 2.08 40
0.6 9.02 4.12

二、计算下面各题，怎样简便就怎样计算。
2.35 + 5.06×1.7 0.125×32×2.5 7.38 - 5.14 + 3.62 - 2.86

10.952 10 3