①7.2×1.25

②0.46×1.9＋0.54×1.9

③0.47×5×0.8

③3.9×9.9+9.9 ④21÷3.5+21÷1.5

⑤2.5×（0.8+0.4）×1.25 ⑥（16.8+1.47）÷0.7

101×1.1-7.3-3.7                   7.85+4.23-2.05+5.77 

3.9÷0.4+3.9÷0.6                  6.46×4.5+4.5×4.54-4.5 

(13.2-0.24×20)÷0.14            1.6×[(1.8+1.95)÷2.5] 

2.5×（3.2＋1.8）                  （5.6＋6.3）＋0.7                            3.7×（9.6－2.8）

5.8＋6.3＋0.9×0.5                  6.72＋1.25＋8                            1.56×1.7＋0.44×1.7

(续重部分不足500g按500g计算)