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Tiếng ViệtBox A
Box B
Box C
Box D
Box E
หน่วยความจำ
11
4
4
11
8
7
0
0
0
0
0
0
5
5
2
6
5
1
4
6
7
8
4
6
0
0
0
0
0
0
7
5
8
10
11
8
May 2024
Wed, May 1
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June
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July
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September
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October
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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
หน่วยความจำ
4
6
3
9
2
5
9
15
11
14
8
8
8
8
6
9
11
3
9
10
7
19
8
12
6
7
11
16
11
4
0
0
0
0
0
0
Box A
Box B
Box C
Box D
Box E
หน่วยความจำ
12
24
18
47
28
16
0
0
0
0
0
0
18
17
28
42
30
10
7
15
15
38
16
0
4
3
11
21
11
4
10
22
27
52
32
2
Box A
Box B
Box C
Box D
Box E
หน่วยความจำ
5
5
4
4
3
4
0
0
0
0
0
0
5
4
6
4
12
6
10
5
6
14
8
1
Box A
Box B
Box C
Box D
Box E
หน่วยความจำ
12
5
8
16
12
8
11
5
12
9
13
11
10
7
7
16
12
7
14
17
13
21
18
17
7
7
15
19
23
19
15
14
14
21
22
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 | C | B | C | B | B | C | A | D | D | |||||||||||
| 1 | B | A | D | A | B | C | C | A | B | B | B | D | B | E | D | B | D | D | C | C | |
| 2 | D | C | C | D | E | E | B | B | C | D | C | D | C | D | D | B | M | E | C | ||
| 3 | A | A | A | D | C | D | E | E | D | A | E | M | E | C | A | D | C | C | |||
| 4 | A | A | A | A | A | A | A | A | B | A | D | A | B | A | E | A | A | ||||
| 5 | B | B | B | B | B | B | B | A | B | A | C | B | B | B | A | A | |||||
| 6 | D | A | B | B | C | B | C | C | A | A | C | C | A | B | B | ||||||
| 7 | D | E | B | A | D | B | C | D | D | B | B | B | D | C | |||||||
| 8 | M | E | D | E | D | E | B | C | E | E | C | D | C | ||||||||
| 9 | C | A | D | M | D | C | D | E | A | E | D | D | |||||||||
| 10 | D | A | C | B | D | A | C | A | A | C | D | ||||||||||
| 11 | E | D | D | A | C | D | C | B | D | ||||||||||||
| 12 | D | D | C | B | B | B | C | A | |||||||||||||
| 13 | A | C | D | B | D | A | B | ||||||||||||||
| 14 | D | B | E | D | E | A | |||||||||||||||
| 15 | D | C | A | D | B | ||||||||||||||||
| 16 | B | B | B | C | |||||||||||||||||
| 17 | B | D | D | ||||||||||||||||||
| 18 | D | 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 | C | B | C | B | B | C | A | D | D | |||||||||||
| 1 | B | A | D | A | B | C | C | A | B | B | B | D | B | E | D | B | D | D | C | C | |
| 2 | D | C | C | D | E | E | B | B | C | D | C | D | C | D | D | B | M | E | C | ||
| 3 | A | A | A | D | C | D | E | E | D | A | E | M | E | C | A | D | C | C | |||
| 4 | A | A | A | A | A | A | A | A | B | A | D | A | B | A | E | A | A | ||||
| 5 | B | B | B | B | B | B | B | A | B | A | C | B | B | B | A | A | |||||
| 6 | D | A | B | B | C | B | C | C | A | A | C | C | A | B | B | ||||||
| 7 | D | E | B | A | D | B | C | D | D | B | B | B | D | C | |||||||
| 8 | M | E | D | E | D | E | B | C | E | E | C | D | C | ||||||||
| 9 | C | A | D | M | D | C | D | E | A | E | D | D | |||||||||
| 10 | D | A | C | B | D | A | C | A | A | C | D | ||||||||||
| 11 | E | D | D | A | C | D | C | B | D | ||||||||||||
| 12 | D | D | C | B | B | B | C | A | |||||||||||||
| 13 | A | C | D | B | D | A | B | ||||||||||||||
| 14 | D | B | E | D | E | A | |||||||||||||||
| 15 | D | C | A | D | B | ||||||||||||||||
| 16 | B | B | B | C | |||||||||||||||||
| 17 | B | D | D | ||||||||||||||||||
| 18 | D | 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 | B | B | |||||||||||||||||||
| 2 | D | C | D | ||||||||||||||||||
| 3 | A | M | A | A | |||||||||||||||||
| 4 | B | A | E | A | A | ||||||||||||||||
| 5 | M | B | B | A | B | C | |||||||||||||||
| 6 | M | B | C | C | B | C | B | ||||||||||||||
| 7 | D | A | C | D | B | A | A | C | |||||||||||||
| 8 | D | E | B | E | C | C | E | D | E | ||||||||||||
| 9 | M | A | D | D | A | C | D | E | D | A | |||||||||||
| 10 | B | A | B | B | D | C | C | D | C | C | D | ||||||||||
| 11 | B | D | A | C | D | D | D | B | B | A | |||||||||||
| 12 | B | D | A | D | D | B | C | D | C | B | D | ||||||||||
| 13 | D | D | E | D | B | A | C | A | B | D | B | B | |||||||||
| 14 | C | D | D | C | B | C | D | C | A | D | B | A | C | ||||||||
| 15 | D | C | B | B | C | C | C | B | D | C | B | B | C | C | |||||||
| 16 | C | D | D | C | C | D | D | A | D | A | D | D | E | D | A | ||||||
| 17 | A | C | D | D | C | A | A | C | B | D | D | D | E | A | D | B | |||||
| 18 | C | D | C | B | C | A | D | B | D | B | A | A | B | C | C | D | B | ||||
| 19 | D | C | C | C | A | D | B | D | E | B | B | C | C | B | C | C | B | C | |||
| 20 | B | E | C | D | D | E | E | D | C | E | C | B | C | E | C | E | C | D | 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 | B | B | |||||||||||||||||||
| 2 | D | C | D | ||||||||||||||||||
| 3 | A | M | A | A | |||||||||||||||||
| 4 | B | A | E | A | A | ||||||||||||||||
| 5 | M | B | B | A | B | C | |||||||||||||||
| 6 | M | B | C | C | B | C | B | ||||||||||||||
| 7 | D | A | C | D | B | A | A | C | |||||||||||||
| 8 | D | E | B | E | C | C | E | D | E | ||||||||||||
| 9 | M | A | D | D | A | C | D | E | D | A | |||||||||||
| 10 | B | A | B | B | D | C | C | D | C | C | D | ||||||||||
| 11 | B | D | A | C | D | D | D | B | B | A | |||||||||||
| 12 | B | D | A | D | D | B | C | D | C | B | D | ||||||||||
| 13 | D | D | E | D | B | A | C | A | B | D | B | B | |||||||||
| 14 | C | D | D | C | B | C | D | C | A | D | B | A | C | ||||||||
| 15 | D | C | B | B | C | C | C | B | D | C | B | B | C | C | |||||||
| 16 | C | D | D | C | C | D | D | A | D | A | D | D | E | D | A | ||||||
| 17 | A | C | D | D | C | A | A | C | B | D | D | D | E | A | D | B | |||||
| 18 | C | D | C | B | C | A | D | B | D | B | A | A | B | C | C | D | B | ||||
| 19 | D | C | C | C | A | D | B | D | E | B | B | C | C | B | C | C | B | C | |||
| 20 | B | E | C | D | D | E | E | D | C | E | C | B | C | E | C | E | C | D | C |
Need practiceMemory
| × | 1 | 2 | 3 | 4 | 5 | 6 | 7 | 8 | 9 | 10 | 11 | 12 |
| 1 | D | B | B | D | D | D | A | |||||
| 2 | C | B | E | D | D | E | M | E | ||||
| 3 | M | C | E | E | A | C | M | D | A | C | ||
| 4 | B | E | A | B | A | A | A | B | A | A | ||
| 5 | C | C | B | A | A | B | M | M | E | B | A | A |
| 6 | C | A | A | C | M | A | A | |||||
| 7 | E | D | E | C | D | C | ||||||
| 8 | E | E | C | E | E | |||||||
| 9 | E | M | E | A | ||||||||
| 10 | D | D | B | |||||||||
| 11 | D | B | D | C | D | D | D | C | D | B | E | D |
| 12 | D | B | D | E | D | E | A | C | B | E | C | D |
Need practiceMemory
| ÷ | 1 | 2 | 3 | 4 | 5 | 6 | 7 | 8 | 9 | 10 |
| 1 | D | A | B | D | A | A | A | D | C | D |
| 2 | D | B | C | D | B | B | B | D | D | D |
| 3 | E | C | C | A | A | D | A | C | D | A |
| 4 | D | A | A | B | A | A | A | B | A | A |
| 5 | B | B | A | B | A | A | A | A | A | A |
| 6 | A | C | A | A | A | A | C | A | A | A |
| 7 | B | B | A | A | B | A | B | A | D | A |
| 8 | D | B | D | D | B | C | C | C | C | C |
| 9 | D | E | A | C | A | A | A | A | A | A |
| 10 | B | B | A | A | A | C | D | C | A | B |