1 . 直接写出得数。
5×80＝             96÷3＝             200÷4＝            7×13＝
0÷400＝            560÷7＝             100－78＝             3×98≈
2×46＝                                      309×9≈

2 . 直接写得数。
10×5＝       12×3＝       90÷3＝       62÷2＝
60×5＝       5×14＝       360÷9＝       80÷4＝
600×3＝       15×6＝       490÷7＝       240÷6＝
8×500＝       4×25＝       800÷8＝       450÷5＝
＝       ＝       ＝       ＝

3 . 直接写得数。
                     
                     
                     

4 . 我能很快写出得数。
50×5＋12＝                       49＋35＝                         21×4＝                         900×9＝
700＋600＝                         8000－2000＝                  45÷9＝                       71×2≈
102×6≈                              198×5≈                       －＝                       ＋＝

5 . 直接写出得数。
140÷7＝                 25×4＝                  20×30＝                 20×5＝                 
120÷4＝                 120×3＝                 104×2＝                 550÷5＝                 
＝                 ＝                  ＝                 ＝

6 . 直接写出得数。
400×5＝                      0×999＝                      800÷4＝                         240÷4＝
0÷4＝                         98÷2＝                       460＋440＝                      3×42＝
602×3≈                      215×5≈                                                 1－＝
                                                                       

7 . 直接写得数。
＋＝                          －＝                 ＋＝             －＝
45×10＝                    20×70＝             240÷8＝             906÷3＝

8 . 直接写出下面各题的得数。   
132×4≈                 305×7≈                 16×5＝                 1600×4＝
101×5＝                 ＝                                    

9 . 算一算。
54＋46＝                           70－26＝                       550－380＝
12×6＝                                   11÷2＝                       75＋25×0＝
                                                      
59×7≈                                704－398≈                    203×4≈

10 . 直接写出得数。
20×4＝                    63÷3＝                    500×8＝                    －＝
3×32＝                    80÷4＝                    210÷3＝