1.计算：

3×9＝             9×3+9＝             9×6＝             5×9＝

7×9＝             8×9＝               1×9＝             9×2＝

2.列式计算：

(1)4个9是多少？             (2)9的7倍是多少？

3.在相应得数的算式下划横线。

36             8×9＝             6×6＝             9×4＝             9×7＝

18             3×9＝             9×2＝             6×3＝             2×9＝

4.(             )里最大能填几

(             )×3＜26             8×(             )＜50

(             )×7＜40             (             )×2＜19

7×(             )＜48             (             )×5＜28