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Tiếng ViệtBox A
Box B
Box C
Box D
Box E
Geheugen
9
7
6
8
9
6
21
10
14
19
23
17
0
0
0
0
0
0
8
3
7
5
5
7
7
9
4
7
6
13
6
10
7
8
14
4
May 2024
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September
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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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Box A
Box B
Box C
Box D
Box E
Geheugen
5
6
3
4
8
3
0
0
0
0
0
0
7
4
9
10
12
3
14
7
9
9
19
7
11
13
10
9
6
6
10
7
9
3
11
5
Box A
Box B
Box C
Box D
Box E
Geheugen
25
25
28
13
38
16
20
24
18
12
27
8
0
0
0
0
0
0
13
23
15
8
32
0
4
11
12
7
16
4
23
31
26
15
43
7
Box A
Box B
Box C
Box D
Box E
Geheugen
2
5
6
4
5
3
17
16
14
14
24
15
9
4
7
3
5
9
7
9
7
7
12
2
Box A
Box B
Box C
Box D
Box E
Geheugen
9
10
9
13
12
8
9
7
14
10
9
12
10
6
10
15
12
6
11
18
15
19
21
16
0
0
0
0
0
0
16
13
16
15
21
19
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 | |||||||||||||||||||||
| 1 | B | D | E | C | B | C | E | E | E | B | B | E | A | A | A | D | B | B | B | ||
| 2 | B | C | C | B | C | E | E | C | C | M | B | M | D | M | D | B | M | E | |||
| 3 | A | A | A | A | A | D | A | A | D | A | A | C | A | C | C | A | A | ||||
| 4 | B | A | B | D | B | E | B | E | M | A | A | B | D | B | B | B | |||||
| 5 | E | A | C | A | M | A | A | C | E | C | E | A | C | A | C | ||||||
| 6 | D | B | A | D | A | A | C | B | B | B | A | B | A | D | |||||||
| 7 | B | C | A | E | C | D | E | C | B | D | C | A | B | ||||||||
| 8 | C | M | C | C | C | E | M | B | M | C | C | M | |||||||||
| 9 | E | M | C | C | E | D | E | A | E | E | A | ||||||||||
| 10 | B | B | B | B | A | A | B | A | E | C | |||||||||||
| 11 | C | E | B | C | A | B | C | C | A | ||||||||||||
| 12 | B | D | C | E | A | A | B | B | |||||||||||||
| 13 | C | C | B | B | A | A | D | ||||||||||||||
| 14 | A | B | A | A | B | A | |||||||||||||||
| 15 | A | B | B | B | B | ||||||||||||||||
| 16 | A | C | A | A | |||||||||||||||||
| 17 | B | D | C | ||||||||||||||||||
| 18 | A | A | |||||||||||||||||||
| 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 | |||||||||||||||||||||
| 1 | B | D | E | C | B | C | E | E | E | B | B | E | A | A | A | D | B | B | B | ||
| 2 | B | C | C | B | C | E | E | C | C | M | B | M | D | M | D | B | M | E | |||
| 3 | A | A | A | A | A | D | A | A | D | A | A | C | A | C | C | A | A | ||||
| 4 | B | A | B | D | B | E | B | E | M | A | A | B | D | B | B | B | |||||
| 5 | E | A | C | A | M | A | A | C | E | C | E | A | C | A | C | ||||||
| 6 | D | B | A | D | A | A | C | B | B | B | A | B | A | D | |||||||
| 7 | B | C | A | E | C | D | E | C | B | D | C | A | B | ||||||||
| 8 | C | M | C | C | C | E | M | B | M | C | C | M | |||||||||
| 9 | E | M | C | C | E | D | E | A | E | E | A | ||||||||||
| 10 | B | B | B | B | A | A | B | A | E | C | |||||||||||
| 11 | C | E | B | C | A | B | C | C | A | ||||||||||||
| 12 | B | D | C | E | A | A | B | B | |||||||||||||
| 13 | C | C | B | B | A | A | D | ||||||||||||||
| 14 | A | B | A | A | B | A | |||||||||||||||
| 15 | A | B | B | B | B | ||||||||||||||||
| 16 | A | C | A | A | |||||||||||||||||
| 17 | B | D | C | ||||||||||||||||||
| 18 | A | A | |||||||||||||||||||
| 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 | C | C | C | ||||||||||||||||||
| 3 | C | A | A | A | |||||||||||||||||
| 4 | E | B | B | B | A | ||||||||||||||||
| 5 | C | C | A | A | A | C | |||||||||||||||
| 6 | M | B | A | A | A | A | A | ||||||||||||||
| 7 | D | A | A | B | B | C | B | B | |||||||||||||
| 8 | D | C | D | C | E | M | B | B | M | ||||||||||||
| 9 | E | A | A | A | D | C | A | C | A | A | |||||||||||
| 10 | E | B | A | A | A | B | A | B | A | B | A | ||||||||||
| 11 | B | B | D | C | D | B | B | B | B | E | |||||||||||
| 12 | D | B | A | E | B | B | C | B | A | A | B | ||||||||||
| 13 | B | E | E | B | A | C | C | C | B | A | D | A | |||||||||
| 14 | A | D | E | B | E | C | C | A | B | A | C | C | B | ||||||||
| 15 | C | A | A | B | A | A | A | A | A | D | E | A | B | C | |||||||
| 16 | B | A | D | D | C | B | E | B | B | A | C | E | B | B | E | ||||||
| 17 | A | B | C | E | B | B | A | A | D | B | B | B | E | B | B | D | |||||
| 18 | B | E | B | A | A | A | D | B | B | A | C | C | A | B | C | B | C | ||||
| 19 | E | B | B | B | B | A | B | E | E | A | E | A | C | A | E | C | A | D | |||
| 20 | M | B | C | B | C | C | B | C | M | B | B | D | C | C | D | D | C | M | C |
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 | C | C | C | ||||||||||||||||||
| 3 | C | A | A | A | |||||||||||||||||
| 4 | E | B | B | B | A | ||||||||||||||||
| 5 | C | C | A | A | A | C | |||||||||||||||
| 6 | M | B | A | A | A | A | A | ||||||||||||||
| 7 | D | A | A | B | B | C | B | B | |||||||||||||
| 8 | D | C | D | C | E | M | B | B | M | ||||||||||||
| 9 | E | A | A | A | D | C | A | C | A | A | |||||||||||
| 10 | E | B | A | A | A | B | A | B | A | B | A | ||||||||||
| 11 | B | B | D | C | D | B | B | B | B | E | |||||||||||
| 12 | D | B | A | E | B | B | C | B | A | A | B | ||||||||||
| 13 | B | E | E | B | A | C | C | C | B | A | D | A | |||||||||
| 14 | A | D | E | B | E | C | C | A | B | A | C | C | B | ||||||||
| 15 | C | A | A | B | A | A | A | A | A | D | E | A | B | C | |||||||
| 16 | B | A | D | D | C | B | E | B | B | A | C | E | B | B | E | ||||||
| 17 | A | B | C | E | B | B | A | A | D | B | B | B | E | B | B | D | |||||
| 18 | B | E | B | A | A | A | D | B | B | A | C | C | A | B | C | B | C | ||||
| 19 | E | B | B | B | B | A | B | E | E | A | E | A | C | A | E | C | A | D | |||
| 20 | M | B | C | B | C | C | B | C | M | B | B | D | C | C | D | D | C | M | C |
Need practiceMemory
| × | 1 | 2 | 3 | 4 | 5 | 6 | 7 | 8 | 9 | 10 | 11 | 12 |
| 1 | E | B | B | A | B | A | E | E | D | C | C | A |
| 2 | D | C | D | B | C | M | M | M | C | C | M | D |
| 3 | A | D | C | A | A | A | A | A | A | D | A | D |
| 4 | B | A | A | A | B | A | B | E | B | E | B | E |
| 5 | C | A | A | B | A | C | B | A | E | A | C | C |
| 6 | B | B | B | M | D | D | A | B | A | D | D | B |
| 7 | C | B | A | B | A | E | A | B | A | B | D | A |
| 8 | C | C | M | M | E | B | M | M | C | C | C | D |
| 9 | A | D | A | E | D | E | E | D | C | E | M | E |
| 10 | A | B | C | E | E | E | E | E | E | E | E | E |
| 11 | D | E | C | B | E | E | E | E | C | A | B | B |
| 12 | B | A | B | E | E | D | E | C | A | B | A | B |
Need practiceMemory
| ÷ | 1 | 2 | 3 | 4 | 5 | 6 | 7 | 8 | 9 | 10 |
| 1 | A | A | C | B | B | B | A | A | E | A |
| 2 | D | M | M | C | D | B | B | C | C | B |
| 3 | A | A | D | A | C | C | A | D | D | A |
| 4 | B | D | B | B | E | D | A | A | B | D |
| 5 | B | A | C | A | A | A | C | A | A | C |
| 6 | B | D | A | A | A | A | A | B | A | A |
| 7 | A | B | A | A | B | A | A | A | B | B |
| 8 | D | C | D | C | D | C | B | C | B | C |
| 9 | A | A | A | A | A | A | A | A | C | C |
| 10 | D | B | B | B | A | A | C | A | A | B |