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Tiếng ViệtBox A
Box B
Box C
Box D
Box E
Пам’ять
11
4
4
11
8
7
0
0
0
0
0
0
2
4
5
3
3
7
3
0
6
7
14
5
0
0
0
0
0
0
5
8
8
10
9
9
May 2024
Wed, May 1
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June
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July
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October
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December
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January 2025
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February
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March
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April
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Mon, Apr 28
Tue, Apr 29
Wed, Apr 30
Box A
Box B
Box C
Box D
Box E
Пам’ять
9
4
3
5
5
3
13
6
13
11
12
10
7
5
6
11
6
10
5
10
15
13
10
12
5
10
9
11
8
12
0
0
0
0
0
0
Box A
Box B
Box C
Box D
Box E
Пам’ять
17
24
24
35
33
12
0
0
0
0
0
0
15
19
27
37
32
15
7
15
14
40
15
0
3
6
11
16
14
4
10
25
21
56
30
3
Box A
Box B
Box C
Box D
Box E
Пам’ять
3
4
6
2
3
7
0
0
0
0
0
0
4
7
2
6
7
11
4
7
8
13
8
4
Box A
Box B
Box C
Box D
Box E
Пам’ять
4
11
11
10
13
12
9
14
6
6
11
15
5
8
9
22
9
6
20
11
15
23
20
11
8
10
15
22
18
17
22
12
10
20
21
15
Addition
Need practiceMemory
| + | 0 | 1 | 2 | 3 | 4 | 5 | 6 | 7 | 8 | 9 | 10 | 11 | 12 | 13 | 14 | 15 | 16 | 17 | 18 | 19 | 20 |
| 0 | C | A | C | C | B | A | C | A | D | C | |||||||||||
| 1 | C | A | A | D | A | D | A | D | D | E | B | B | D | D | C | D | D | B | D | B | |
| 2 | M | B | D | C | D | C | B | E | D | E | E | E | D | E | C | E | E | D | C | ||
| 3 | A | C | D | A | A | C | M | D | A | A | E | E | A | C | A | M | M | D | |||
| 4 | E | A | A | A | A | B | A | A | A | E | E | B | A | A | A | A | D | ||||
| 5 | A | A | A | B | A | A | B | A | A | E | A | B | B | B | B | A | |||||
| 6 | C | B | A | A | C | A | C | C | D | C | C | C | A | C | C | ||||||
| 7 | D | C | C | D | B | A | C | E | D | C | B | B | D | D | |||||||
| 8 | E | D | C | E | B | E | C | C | B | D | C | B | D | ||||||||
| 9 | D | M | A | C | E | M | A | A | E | A | E | M | |||||||||
| 10 | D | D | B | B | D | D | B | D | D | D | C | ||||||||||
| 11 | B | D | B | C | B | C | B | A | B | ||||||||||||
| 12 | B | D | B | A | C | B | D | D | |||||||||||||
| 13 | D | D | C | D | B | A | B | ||||||||||||||
| 14 | A | B | C | B | B | C | |||||||||||||||
| 15 | D | D | A | B | C | ||||||||||||||||
| 16 | B | A | C | A | |||||||||||||||||
| 17 | E | B | C | ||||||||||||||||||
| 18 | B | C | |||||||||||||||||||
| 19 | A | ||||||||||||||||||||
| 20 |
Addition
Need practiceMemory
| + | 0 | 1 | 2 | 3 | 4 | 5 | 6 | 7 | 8 | 9 | 10 | 11 | 12 | 13 | 14 | 15 | 16 | 17 | 18 | 19 | 20 |
| 0 | C | A | C | C | B | A | C | A | D | C | |||||||||||
| 1 | C | A | A | D | A | D | A | D | D | E | B | B | D | D | C | D | D | B | D | B | |
| 2 | M | B | D | C | D | C | B | E | D | E | E | E | D | E | C | E | E | D | C | ||
| 3 | A | C | D | A | A | C | M | D | A | A | E | E | A | C | A | M | M | D | |||
| 4 | E | A | A | A | A | B | A | A | A | E | E | B | A | A | A | A | D | ||||
| 5 | A | A | A | B | A | A | B | A | A | E | A | B | B | B | B | A | |||||
| 6 | C | B | A | A | C | A | C | C | D | C | C | C | A | C | C | ||||||
| 7 | D | C | C | D | B | A | C | E | D | C | B | B | D | D | |||||||
| 8 | E | D | C | E | B | E | C | C | B | D | C | B | D | ||||||||
| 9 | D | M | A | C | E | M | A | A | E | A | E | M | |||||||||
| 10 | D | D | B | B | D | D | B | D | D | D | C | ||||||||||
| 11 | B | D | B | C | B | C | B | A | B | ||||||||||||
| 12 | B | D | B | A | C | B | D | D | |||||||||||||
| 13 | D | D | C | D | B | A | B | ||||||||||||||
| 14 | A | B | C | B | B | C | |||||||||||||||
| 15 | D | D | A | B | C | ||||||||||||||||
| 16 | B | A | C | A | |||||||||||||||||
| 17 | E | B | C | ||||||||||||||||||
| 18 | B | C | |||||||||||||||||||
| 19 | A | ||||||||||||||||||||
| 20 |
Subtraction
Need practiceMemory
| – | 0 | 1 | 2 | 3 | 4 | 5 | 6 | 7 | 8 | 9 | 10 | 11 | 12 | 13 | 14 | 15 | 16 | 17 | 18 | 19 | 20 |
| 0 | |||||||||||||||||||||
| 1 | E | B | |||||||||||||||||||
| 2 | E | D | C | ||||||||||||||||||
| 3 | C | M | D | M | |||||||||||||||||
| 4 | A | A | A | M | A | ||||||||||||||||
| 5 | C | C | C | B | B | A | |||||||||||||||
| 6 | C | C | B | C | B | C | A | ||||||||||||||
| 7 | D | C | C | A | D | B | D | D | |||||||||||||
| 8 | M | C | E | M | B | B | E | C | B | ||||||||||||
| 9 | A | C | M | C | D | C | A | E | M | A | |||||||||||
| 10 | D | B | B | D | B | B | C | B | B | D | C | ||||||||||
| 11 | A | B | A | C | D | D | B | C | C | D | |||||||||||
| 12 | C | A | D | C | A | C | B | D | C | B | B | ||||||||||
| 13 | A | B | B | B | D | D | D | C | E | C | D | B | |||||||||
| 14 | D | A | C | D | D | D | A | B | B | B | B | D | D | ||||||||
| 15 | D | C | C | D | B | D | A | D | D | C | D | C | C | D | |||||||
| 16 | B | C | A | A | D | D | A | D | D | B | E | C | B | D | D | ||||||
| 17 | B | D | A | C | B | C | E | A | D | D | B | A | B | B | A | D | |||||
| 18 | A | B | D | B | C | B | B | D | D | D | C | B | B | D | A | D | B | ||||
| 19 | C | D | A | B | A | C | B | C | B | D | B | C | C | D | A | B | B | B | |||
| 20 | B | E | E | E | E | D | E | D | C | D | B | D | C | C | D | E | B | E | E |
Subtraction
Need practiceMemory
| – | 0 | 1 | 2 | 3 | 4 | 5 | 6 | 7 | 8 | 9 | 10 | 11 | 12 | 13 | 14 | 15 | 16 | 17 | 18 | 19 | 20 |
| 0 | |||||||||||||||||||||
| 1 | E | B | |||||||||||||||||||
| 2 | E | D | C | ||||||||||||||||||
| 3 | C | M | D | M | |||||||||||||||||
| 4 | A | A | A | M | A | ||||||||||||||||
| 5 | C | C | C | B | B | A | |||||||||||||||
| 6 | C | C | B | C | B | C | A | ||||||||||||||
| 7 | D | C | C | A | D | B | D | D | |||||||||||||
| 8 | M | C | E | M | B | B | E | C | B | ||||||||||||
| 9 | A | C | M | C | D | C | A | E | M | A | |||||||||||
| 10 | D | B | B | D | B | B | C | B | B | D | C | ||||||||||
| 11 | A | B | A | C | D | D | B | C | C | D | |||||||||||
| 12 | C | A | D | C | A | C | B | D | C | B | B | ||||||||||
| 13 | A | B | B | B | D | D | D | C | E | C | D | B | |||||||||
| 14 | D | A | C | D | D | D | A | B | B | B | B | D | D | ||||||||
| 15 | D | C | C | D | B | D | A | D | D | C | D | C | C | D | |||||||
| 16 | B | C | A | A | D | D | A | D | D | B | E | C | B | D | D | ||||||
| 17 | B | D | A | C | B | C | E | A | D | D | B | A | B | B | A | D | |||||
| 18 | A | B | D | B | C | B | B | D | D | D | C | B | B | D | A | D | B | ||||
| 19 | C | D | A | B | A | C | B | C | B | D | B | C | C | D | A | B | B | B | |||
| 20 | B | E | E | E | E | D | E | D | C | D | B | D | C | C | D | E | B | E | E |
Need practiceMemory
| × | 1 | 2 | 3 | 4 | 5 | 6 | 7 | 8 | 9 | 10 | 11 | 12 |
| 1 | C | D | E | C | C | D | D | |||||
| 2 | B | C | D | E | C | B | M | E | ||||
| 3 | M | M | M | M | M | M | M | A | E | D | ||
| 4 | A | B | A | B | A | E | B | A | A | A | ||
| 5 | M | E | C | M | B | E | M | A | B | B | C | B |
| 6 | D | C | A | D | M | M | C | |||||
| 7 | B | D | B | D | D | B | ||||||
| 8 | D | E | D | D | E | |||||||
| 9 | E | M | M | M | ||||||||
| 10 | C | A | E | |||||||||
| 11 | C | E | D | B | C | C | C | B | C | C | D | B |
| 12 | E | D | B | A | D | B | D | D | D | E | E | D |
Need practiceMemory
| ÷ | 1 | 2 | 3 | 4 | 5 | 6 | 7 | 8 | 9 | 10 |
| 1 | B | B | D | A | A | C | D | B | A | C |
| 2 | C | D | D | B | D | C | D | B | D | B |
| 3 | A | A | A | C | A | A | E | D | D | D |
| 4 | A | A | A | A | A | A | A | A | A | A |
| 5 | B | A | B | B | A | A | C | A | B | A |
| 6 | C | A | A | B | A | A | B | A | A | B |
| 7 | A | B | A | A | D | C | C | A | A | B |
| 8 | D | D | C | D | C | C | C | B | C | C |
| 9 | A | A | M | A | C | C | A | A | A | A |
| 10 | D | A | B | B | A | B | B | A | A | D |