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Tiếng ViệtBox A
Box B
Box C
Box D
Box E
หน่วยความจำ
9
7
6
8
9
6
9
18
19
18
26
14
0
0
0
0
0
0
2
8
5
5
9
6
7
10
7
6
7
9
5
4
9
7
15
9
May 2024
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January 2025
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March
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April
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Box A
Box B
Box C
Box D
Box E
หน่วยความจำ
2
5
6
5
4
7
0
0
0
0
0
0
8
9
8
3
10
7
12
14
14
8
12
5
10
14
9
5
6
11
5
11
7
11
4
7
Box A
Box B
Box C
Box D
Box E
หน่วยความจำ
19
31
25
17
39
14
20
24
15
14
26
10
0
0
0
0
0
0
14
21
16
8
32
0
7
9
8
7
21
2
17
41
25
11
44
7
Box A
Box B
Box C
Box D
Box E
หน่วยความจำ
3
5
5
5
1
6
16
13
19
15
18
19
10
3
5
5
6
8
6
11
7
5
13
2
Box A
Box B
Box C
Box D
Box E
หน่วยความจำ
12
7
13
11
7
11
10
10
9
11
11
10
11
9
6
8
15
10
15
18
19
14
23
11
0
0
0
0
0
0
19
19
21
16
19
6
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 | A | A | E | B | B | B | E | C | D | D | B | A | A | A | A | B | A | B | ||
| 2 | B | M | C | C | D | M | E | B | B | C | C | D | B | C | D | C | D | B | |||
| 3 | A | A | A | D | C | C | M | A | A | E | A | E | C | A | D | D | C | ||||
| 4 | E | B | A | B | M | B | B | D | D | A | B | E | B | B | D | B | |||||
| 5 | C | C | C | C | A | M | C | E | M | A | C | C | B | B | M | ||||||
| 6 | A | B | B | A | A | A | D | B | A | D | B | D | B | A | |||||||
| 7 | E | C | E | A | E | C | B | C | E | C | A | E | E | ||||||||
| 8 | E | C | M | E | B | C | C | B | C | M | M | C | |||||||||
| 9 | E | E | D | C | C | M | D | D | E | A | A | ||||||||||
| 10 | A | B | E | A | B | C | B | D | E | A | |||||||||||
| 11 | B | B | A | D | A | B | D | C | B | ||||||||||||
| 12 | C | C | E | B | B | D | A | D | |||||||||||||
| 13 | A | B | B | C | A | C | B | ||||||||||||||
| 14 | A | C | B | A | A | A | |||||||||||||||
| 15 | A | C | E | B | A | ||||||||||||||||
| 16 | C | B | B | E | |||||||||||||||||
| 17 | B | A | B | ||||||||||||||||||
| 18 | A | A | |||||||||||||||||||
| 19 | B | ||||||||||||||||||||
| 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 | A | A | E | B | B | B | E | C | D | D | B | A | A | A | A | B | A | B | ||
| 2 | B | M | C | C | D | M | E | B | B | C | C | D | B | C | D | C | D | B | |||
| 3 | A | A | A | D | C | C | M | A | A | E | A | E | C | A | D | D | C | ||||
| 4 | E | B | A | B | M | B | B | D | D | A | B | E | B | B | D | B | |||||
| 5 | C | C | C | C | A | M | C | E | M | A | C | C | B | B | M | ||||||
| 6 | A | B | B | A | A | A | D | B | A | D | B | D | B | A | |||||||
| 7 | E | C | E | A | E | C | B | C | E | C | A | E | E | ||||||||
| 8 | E | C | M | E | B | C | C | B | C | M | M | C | |||||||||
| 9 | E | E | D | C | C | M | D | D | E | A | A | ||||||||||
| 10 | A | B | E | A | B | C | B | D | E | A | |||||||||||
| 11 | B | B | A | D | A | B | D | C | B | ||||||||||||
| 12 | C | C | E | B | B | D | A | D | |||||||||||||
| 13 | A | B | B | C | A | C | B | ||||||||||||||
| 14 | A | C | B | A | A | A | |||||||||||||||
| 15 | A | C | E | B | A | ||||||||||||||||
| 16 | C | B | B | E | |||||||||||||||||
| 17 | B | A | B | ||||||||||||||||||
| 18 | A | A | |||||||||||||||||||
| 19 | B | ||||||||||||||||||||
| 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 | C | B | |||||||||||||||||||
| 2 | B | B | B | ||||||||||||||||||
| 3 | A | A | A | A | |||||||||||||||||
| 4 | B | B | B | A | M | ||||||||||||||||
| 5 | C | C | A | A | C | C | |||||||||||||||
| 6 | B | B | B | B | D | A | C | ||||||||||||||
| 7 | E | B | A | D | B | A | B | B | |||||||||||||
| 8 | C | C | C | B | D | B | C | B | C | ||||||||||||
| 9 | A | A | D | A | A | A | A | A | A | A | |||||||||||
| 10 | A | B | B | A | A | B | B | B | A | B | B | ||||||||||
| 11 | D | B | B | B | D | C | A | E | A | A | |||||||||||
| 12 | B | A | C | C | D | C | B | D | B | C | C | ||||||||||
| 13 | A | A | A | B | B | A | A | B | C | C | B | A | |||||||||
| 14 | B | B | B | A | B | E | C | A | A | B | A | A | A | ||||||||
| 15 | A | B | E | B | E | B | C | A | B | B | B | E | B | E | |||||||
| 16 | C | C | B | B | B | B | A | C | A | A | B | A | B | A | D | ||||||
| 17 | B | C | B | B | B | B | C | E | B | B | C | B | E | E | C | A | |||||
| 18 | A | A | C | E | E | B | A | D | A | B | E | B | A | E | A | A | A | ||||
| 19 | E | B | C | A | B | B | C | D | E | C | B | C | A | C | E | B | B | A | |||
| 20 | D | E | D | B | D | D | C | C | C | B | D | B | B | E | C | B | B | B | 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 | C | B | |||||||||||||||||||
| 2 | B | B | B | ||||||||||||||||||
| 3 | A | A | A | A | |||||||||||||||||
| 4 | B | B | B | A | M | ||||||||||||||||
| 5 | C | C | A | A | C | C | |||||||||||||||
| 6 | B | B | B | B | D | A | C | ||||||||||||||
| 7 | E | B | A | D | B | A | B | B | |||||||||||||
| 8 | C | C | C | B | D | B | C | B | C | ||||||||||||
| 9 | A | A | D | A | A | A | A | A | A | A | |||||||||||
| 10 | A | B | B | A | A | B | B | B | A | B | B | ||||||||||
| 11 | D | B | B | B | D | C | A | E | A | A | |||||||||||
| 12 | B | A | C | C | D | C | B | D | B | C | C | ||||||||||
| 13 | A | A | A | B | B | A | A | B | C | C | B | A | |||||||||
| 14 | B | B | B | A | B | E | C | A | A | B | A | A | A | ||||||||
| 15 | A | B | E | B | E | B | C | A | B | B | B | E | B | E | |||||||
| 16 | C | C | B | B | B | B | A | C | A | A | B | A | B | A | D | ||||||
| 17 | B | C | B | B | B | B | C | E | B | B | C | B | E | E | C | A | |||||
| 18 | A | A | C | E | E | B | A | D | A | B | E | B | A | E | A | A | A | ||||
| 19 | E | B | C | A | B | B | C | D | E | C | B | C | A | C | E | B | B | A | |||
| 20 | D | E | D | B | D | D | C | C | C | B | D | B | B | E | C | B | B | B | C |
Need practiceMemory
| × | 1 | 2 | 3 | 4 | 5 | 6 | 7 | 8 | 9 | 10 | 11 | 12 |
| 1 | B | A | A | D | A | C | C | C | B | B | B | E |
| 2 | E | C | C | D | B | D | E | D | C | D | D | M |
| 3 | A | A | D | A | A | D | A | C | A | C | E | A |
| 4 | B | B | B | E | B | B | A | D | M | E | D | A |
| 5 | C | C | M | A | A | M | M | E | A | C | M | B |
| 6 | M | D | A | C | D | D | D | A | A | A | D | D |
| 7 | B | A | B | E | B | E | A | A | A | E | E | C |
| 8 | M | M | M | M | E | C | M | B | E | E | E | B |
| 9 | C | C | A | M | A | A | D | C | A | A | C | A |
| 10 | E | A | E | A | B | C | E | D | E | B | B | B |
| 11 | B | B | C | E | C | E | B | B | B | E | E | E |
| 12 | C | D | A | E | E | E | E | B | C | C | A | A |
Need practiceMemory
| ÷ | 1 | 2 | 3 | 4 | 5 | 6 | 7 | 8 | 9 | 10 |
| 1 | D | A | A | D | A | B | C | A | A | B |
| 2 | C | C | C | C | C | B | B | B | C | B |
| 3 | C | C | C | A | A | A | A | A | A | A |
| 4 | A | D | B | A | B | B | A | B | B | A |
| 5 | C | C | C | C | A | A | A | C | A | B |
| 6 | D | A | A | A | A | A | A | A | B | A |
| 7 | B | C | A | A | A | B | B | B | C | B |
| 8 | B | B | B | B | C | B | B | B | C | B |
| 9 | D | A | A | A | A | A | A | A | A | A |
| 10 | B | B | B | A | A | B | C | A | B | B |