【推荐1】把下面的百分数化成小数或整数．
78%＝               180%＝               500%＝                  201%＝
3.5%＝             0.09%＝               0.2%＝                 90.4%＝

【推荐2】怎样简便就怎样计算．
74×99+74          7200÷25÷4          137×89-89×37
24.56-5.7-14.3          2.53+1.5+8.5+0.47          32×125

【推荐3】计算下列各题，怎样简便就怎样算．
0．97×6.8－0.47×6.8　　9.6-11÷7+×4
×[（+）÷]          0.8×5.6+5.4×-80%

【推荐1】怎样简便怎样算．
××　　             　×+40%×
90×                        24×+
600×

【推荐2】简算．
30%×3/7+3/10×4/7                 2/5×3/8+1/4×1
（1/2+1/3+1/4）×36               20%×30%+1/5×7/10

【推荐3】用你喜欢的方法计算：       
（1）× ×
（2）×（ ）       
（3）× ×

【推荐1】脱式计算（能简算的要简算）
2.5×7.1×4                         16.12×99＋16.12                       5.2×0.9＋0.9×4.8
26×15.7＋15.7×24             (2.275 ＋0.625)×0.28                 64－2.64×0.5
2.4×12.5=                              9.43×101                                 3.4×12.5+6.6×12.5

3.65×5.6-6.8                       16.5×1.5+3.02                           72×0.01×2.8     
(3.6+6.4)×0.68                    0.125×9.3×0.8                            6.2×1.08+1.08×3.8

【推荐2】计算。
0.74×2.3 + 2.3×0.26             (2.4-1.8)÷4×2.5                      1-0.8x=0.6

【推荐3】能简算的要简便计算．
10.4+9.6÷0.32                                   3.6×3.4+6.6×3.6
19.2÷2.5÷8                                      9.4÷﹝(1.3+1.4) ÷0.27﹞