| (答え) |
| |
|
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| (1) |
|
| |
× |
|
= |
5 1 |
= |
|
| 10 |
11 |
10×11 |
5 |
|
|
|
|
| 11 |
12 |
11×12 |
6 |
| |
|
1 6 |
|
|
| (2) |
|
| |
× |
|
= |
1 2 |
= |
|
| 13 |
10 |
13×10 |
2 |
|
|
|
|
| 15 |
13 |
15×13 |
3 |
| |
|
3 1 |
|
|
(3) |
|
| |
× |
|
= |
5 5 |
= |
|
| 15 |
20 |
15×20 |
25 |
|
|
|
|
| 16 |
21 |
16×21 |
28 |
| |
|
4 7 |
|
|
| (4) |
|
| |
× |
|
= |
2 4 |
= |
|
| 18 |
28 |
18×28 |
8 |
|
|
|
|
| 35 |
45 |
35×45 |
25 |
| |
|
5 5 |
|
|
| (5) |
|
| |
× |
|
= |
5 1 |
= |
|
| 45 |
14 |
45×14 |
5 |
|
|
|
|
| 56 |
27 |
56×27 |
12 |
| |
|
4 3 |
|
|
| (6) |
|
| |
× |
|
= |
3 3 |
= |
|
| 15 |
57 |
15×57 |
9 |
|
|
|
|
| 38 |
65 |
38×65 |
26 |
| |
|
2 13 |
|
|
| (7) |
|
| |
× |
|
= |
1 2 |
= |
|
| 29 |
52 |
29×52 |
2 |
|
|
|
|
| 78 |
87 |
78×87 |
9 |
| |
|
3 3 |
|
|
| (8) |
|
| |
× |
|
= |
1 2 |
= |
|
| 19 |
74 |
19×74 |
2 |
|
|
|
|
| 37 |
95 |
37×95 |
5 |
| |
|
1 5 |
|
|
| (9) |
|
| |
× |
|
= |
1 6 |
= |
|
| 13 |
18 |
13×18 |
6 |
|
|
|
|
| 75 |
65 |
75×65 |
125 |
| |
|
25 5 |
|
|
| (10) |
|
| |
× |
|
= |
19 16 |
= |
|
| 57 |
64 |
57×64 |
304 |
|
|
|
|
| 92 |
87 |
92×87 |
667 |
| |
|
23 29 |
|
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