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Tiếng ViệtBox A
Box B
Box C
Box D
Box E
Geheugen
11
4
4
11
8
7
0
0
0
0
0
0
3
3
1
6
8
3
4
5
3
9
6
8
0
0
0
0
0
0
5
2
6
11
19
6
June 2024
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July
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August
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September
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October
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November
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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
Tue, Apr 1
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May
Thu, May 1
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Fri, May 30
Sat, May 31
Box A
Box B
Box C
Box D
Box E
Geheugen
5
4
4
4
6
6
10
8
16
14
10
7
5
4
5
13
13
5
11
10
8
16
7
13
8
6
12
11
6
12
0
0
0
0
0
0
Box A
Box B
Box C
Box D
Box E
Geheugen
14
24
21
47
27
12
0
0
0
0
0
0
17
16
27
49
22
14
7
14
16
39
15
0
4
6
9
15
17
3
10
21
27
55
30
2
Box A
Box B
Box C
Box D
Box E
Geheugen
3
8
3
2
2
7
0
0
0
0
0
0
9
3
7
5
9
4
4
9
8
13
6
4
Box A
Box B
Box C
Box D
Box E
Geheugen
7
9
7
13
12
13
8
10
7
14
13
9
8
3
15
19
8
6
10
12
20
17
21
20
11
11
17
15
13
23
9
12
14
27
24
14
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 | A | M | C | C | A | D | D | C | |||||||||||
| 1 | D | D | B | D | B | D | C | D | B | D | B | D | D | C | D | B | C | C | D | D | |
| 2 | D | E | D | D | C | C | B | E | D | E | E | D | C | M | E | C | E | C | C | ||
| 3 | E | M | A | D | A | D | A | D | C | M | E | D | D | M | D | C | A | M | |||
| 4 | E | A | A | A | A | A | A | E | A | A | B | A | A | A | B | A | A | ||||
| 5 | E | B | B | A | A | A | B | C | B | A | B | B | C | A | A | B | |||||
| 6 | B | B | C | C | C | C | C | A | C | D | C | A | B | B | A | ||||||
| 7 | E | C | D | B | A | D | C | A | B | B | C | C | B | B | |||||||
| 8 | B | C | B | D | C | B | B | D | D | D | B | C | M | ||||||||
| 9 | A | C | A | E | D | C | D | A | D | C | A | D | |||||||||
| 10 | B | D | C | B | C | D | D | D | C | C | B | ||||||||||
| 11 | D | D | B | D | D | D | A | D | B | ||||||||||||
| 12 | C | D | B | A | D | A | B | C | |||||||||||||
| 13 | B | A | D | C | C | B | B | ||||||||||||||
| 14 | D | E | D | B | D | A | |||||||||||||||
| 15 | D | A | C | B | C | ||||||||||||||||
| 16 | D | D | D | D | |||||||||||||||||
| 17 | B | B | D | ||||||||||||||||||
| 18 | A | B | |||||||||||||||||||
| 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 | A | M | C | C | A | D | D | C | |||||||||||
| 1 | D | D | B | D | B | D | C | D | B | D | B | D | D | C | D | B | C | C | D | D | |
| 2 | D | E | D | D | C | C | B | E | D | E | E | D | C | M | E | C | E | C | C | ||
| 3 | E | M | A | D | A | D | A | D | C | M | E | D | D | M | D | C | A | M | |||
| 4 | E | A | A | A | A | A | A | E | A | A | B | A | A | A | B | A | A | ||||
| 5 | E | B | B | A | A | A | B | C | B | A | B | B | C | A | A | B | |||||
| 6 | B | B | C | C | C | C | C | A | C | D | C | A | B | B | A | ||||||
| 7 | E | C | D | B | A | D | C | A | B | B | C | C | B | B | |||||||
| 8 | B | C | B | D | C | B | B | D | D | D | B | C | M | ||||||||
| 9 | A | C | A | E | D | C | D | A | D | C | A | D | |||||||||
| 10 | B | D | C | B | C | D | D | D | C | C | B | ||||||||||
| 11 | D | D | B | D | D | D | A | D | B | ||||||||||||
| 12 | C | D | B | A | D | A | B | C | |||||||||||||
| 13 | B | A | D | C | C | B | B | ||||||||||||||
| 14 | D | E | D | B | D | A | |||||||||||||||
| 15 | D | A | C | B | C | ||||||||||||||||
| 16 | D | D | D | D | |||||||||||||||||
| 17 | B | B | D | ||||||||||||||||||
| 18 | A | B | |||||||||||||||||||
| 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 | A | B | |||||||||||||||||||
| 2 | E | M | B | ||||||||||||||||||
| 3 | M | D | A | M | |||||||||||||||||
| 4 | B | A | A | A | A | ||||||||||||||||
| 5 | C | B | A | A | A | A | |||||||||||||||
| 6 | D | C | C | C | C | A | C | ||||||||||||||
| 7 | C | A | C | D | B | B | C | B | |||||||||||||
| 8 | M | C | E | E | E | D | E | C | E | ||||||||||||
| 9 | A | C | M | A | C | A | D | D | E | A | |||||||||||
| 10 | D | D | B | D | B | D | B | D | B | C | A | ||||||||||
| 11 | C | D | A | A | C | B | D | B | C | B | |||||||||||
| 12 | C | C | C | D | D | A | C | E | C | A | C | ||||||||||
| 13 | D | D | B | E | C | A | D | B | C | A | D | C | |||||||||
| 14 | D | B | B | A | C | C | D | D | C | D | B | D | B | ||||||||
| 15 | A | B | A | A | C | B | B | B | C | D | C | A | D | C | |||||||
| 16 | A | B | B | C | B | B | A | D | D | B | C | A | A | B | A | ||||||
| 17 | D | B | D | C | C | D | B | D | C | B | E | B | B | C | C | D | |||||
| 18 | B | B | D | C | C | B | B | C | D | A | D | D | D | C | A | C | B | ||||
| 19 | D | D | D | B | B | D | A | D | A | D | B | B | D | C | D | D | D | C | |||
| 20 | E | E | B | D | D | D | C | C | D | C | C | B | C | C | E | E | M | 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 | A | B | |||||||||||||||||||
| 2 | E | M | B | ||||||||||||||||||
| 3 | M | D | A | M | |||||||||||||||||
| 4 | B | A | A | A | A | ||||||||||||||||
| 5 | C | B | A | A | A | A | |||||||||||||||
| 6 | D | C | C | C | C | A | C | ||||||||||||||
| 7 | C | A | C | D | B | B | C | B | |||||||||||||
| 8 | M | C | E | E | E | D | E | C | E | ||||||||||||
| 9 | A | C | M | A | C | A | D | D | E | A | |||||||||||
| 10 | D | D | B | D | B | D | B | D | B | C | A | ||||||||||
| 11 | C | D | A | A | C | B | D | B | C | B | |||||||||||
| 12 | C | C | C | D | D | A | C | E | C | A | C | ||||||||||
| 13 | D | D | B | E | C | A | D | B | C | A | D | C | |||||||||
| 14 | D | B | B | A | C | C | D | D | C | D | B | D | B | ||||||||
| 15 | A | B | A | A | C | B | B | B | C | D | C | A | D | C | |||||||
| 16 | A | B | B | C | B | B | A | D | D | B | C | A | A | B | A | ||||||
| 17 | D | B | D | C | C | D | B | D | C | B | E | B | B | C | C | D | |||||
| 18 | B | B | D | C | C | B | B | C | D | A | D | D | D | C | A | C | B | ||||
| 19 | D | D | D | B | B | D | A | D | A | D | B | B | D | C | D | D | D | C | |||
| 20 | E | E | B | D | D | D | C | C | D | C | C | B | C | C | E | E | M | E | E |
Need practiceMemory
| × | 1 | 2 | 3 | 4 | 5 | 6 | 7 | 8 | 9 | 10 | 11 | 12 |
| 1 | D | B | E | C | B | C | C | |||||
| 2 | M | B | C | D | C | E | E | B | ||||
| 3 | M | C | E | C | M | E | A | A | M | M | ||
| 4 | M | A | B | A | A | M | B | A | A | B | ||
| 5 | B | A | B | B | B | M | C | A | A | E | B | M |
| 6 | C | A | C | D | D | C | D | |||||
| 7 | D | A | D | B | D | E | ||||||
| 8 | E | C | E | E | D | |||||||
| 9 | E | M | M | A | ||||||||
| 10 | D | A | A | |||||||||
| 11 | D | C | B | B | D | D | B | D | D | E | B | B |
| 12 | D | B | D | D | C | C | E | D | C | E | C | D |
Need practiceMemory
| ÷ | 1 | 2 | 3 | 4 | 5 | 6 | 7 | 8 | 9 | 10 |
| 1 | D | A | B | D | A | C | D | D | B | A |
| 2 | C | C | C | C | B | B | C | B | C | D |
| 3 | C | A | D | A | E | C | D | A | C | A |
| 4 | B | A | A | A | A | A | A | A | A | A |
| 5 | B | A | A | B | B | A | A | A | B | B |
| 6 | C | C | A | A | A | C | C | A | A | B |
| 7 | A | D | A | C | B | B | A | B | C | A |
| 8 | C | D | B | B | E | D | C | C | C | B |
| 9 | A | D | C | A | A | A | C | C | A | A |
| 10 | C | E | B | C | C | B | B | B | A | D |