1 . 直接写出得数。
37＋53＝       60－11＝       99－79＝       270＋300＝
60×5＝       300×7＝       13×3＝       25×0＝
                     

2 . 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≈                       －＝                       ＋＝

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

4 . 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≈

5 . 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＝
＝       ＝       ＝       ＝

6 . 直接写出得数。
                                               
                                                 
                                                     

7 . 我能很快写出得数。
32＋53＝             79－27＝                 9×200＝                 5×6＋0＝
＋＝            1－＝                    198×5≈            71×2≈

8 . 直接写得数。
                     
                     
                     

9 . 直接写出下面各题的得数。
                                          
                                        
                                   

10 . 直接写得数。