题目内容
口算
(1)7×7 |
(2)2×9 |
(3)8×6 |
3 ×2 |
4 ×4 |
6 ×7 |
5 ×0 |
1 ×8 |
9 ×9 |
10 ×6 |
8 ×4 |
6 ×4 |
0 |
6 |
8 |
16 |
18 |
24 |
32 |
42 |
48 |
49 |
60 |
81 |
答案:49,6,0,60;18,16,8,32;48,42,81,24
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