0.46×7.5+0.46×2.5
3-7.14÷3.5×1.05
9.9×8.6+0.86
[20-（90.75÷6.6+2.25）]×11.6．

0.46×7.5+0.46×2.5．

用递等式计算（能简算的要简算）．
7.8÷2.6+2.7×1.5
35.6-5×1.7
55.4×1.6-55.4×0.6
21÷2.5÷0.4
6.33×101-6.33
（1.1-0.78）×（2.7-1.95）