Let’s solve this step by step.
We are given a grid where we need to add each row number to each column number. The rows go down the left side (1, 10, 4, 6, 2, 3, 5, 8, 9, 7) and the columns go across the top (9, 7, 8, 6, 2, 4, 10, 3, 1, 5).
We’ll fill in each cell by adding the row number + column number.
Let’s do it row by row:
---
Row 1:
- 1 + 9 = 10
- 1 + 7 = 8
- 1 + 8 = 9
- 1 + 6 = 7
- 1 + 2 = 3
- 1 + 4 = 5
- 1 + 10 = 11
- 1 + 3 = 4
- 1 + 1 = 2
- 1 + 5 = 6
→ Row 1: 10, 8, 9, 7, 3, 5, 11, 4, 2, 6
---
Row 10:
- 10 + 9 = 19
- 10 + 7 = 17
- 10 + 8 = 18
- 10 + 6 = 16
- 10 + 2 = 12
- 10 + 4 = 14
- 10 + 10 = 20
- 10 + 3 = 13
- 10 + 1 = 11
- 10 + 5 = 15
→ Row 10: 19, 17, 18, 16, 12, 14, 20, 13, 11, 15
---
Row 4:
- 4 + 9 = 13
- 4 + 7 = 11
- 4 + 8 = 12
- 4 + 6 = 10
- 4 + 2 = 6
- 4 + 4 = 8
- 4 + 10 = 14
- 4 + 3 = 7
- 4 + 1 = 5
- 4 + 5 = 9
→ Row 4: 13, 11, 12, 10, 6, 8, 14, 7, 5, 9
---
Row 6:
- 6 + 9 = 15
- 6 + 7 = 13
- 6 + 8 = 14
- 6 + 6 = 12
- 6 + 2 = 8
- 6 + 4 = 10
- 6 + 10 = 16
- 6 + 3 = 9
- 6 + 1 = 7
- 6 + 5 = 11
→ Row 6: 15, 13, 14, 12, 8, 10, 16, 9, 7, 11
---
Row 2:
- 2 + 9 = 11
- 2 + 7 = 9
- 2 + 8 = 10
- 2 + 6 = 8
- 2 + 2 = 4
- 2 + 4 = 6
- 2 + 10 = 12
- 2 + 3 = 5
- 2 + 1 = 3
- 2 + 5 = 7
→ Row 2: 11, 9, 10, 8, 4, 6, 12, 5, 3, 7
---
Row 3:
- 3 + 9 = 12
- 3 + 7 = 10
- 3 + 8 = 11
- 3 + 6 = 9
- 3 + 2 = 5
- 3 + 4 = 7
- 3 + 10 = 13
- 3 + 3 = 6
- 3 + 1 = 4
- 3 + 5 = 8
→ Row 3: 12, 10, 11, 9, 5, 7, 13, 6, 4, 8
---
Row 5:
- 5 + 9 = 14
- 5 + 7 = 12
- 5 + 8 = 13
- 5 + 6 = 11
- 5 + 2 = 7
- 5 + 4 = 9
- 5 + 10 = 15
- 5 + 3 = 8
- 5 + 1 = 6
- 5 + 5 = 10
→ Row 5: 14, 12, 13, 11, 7, 9, 15, 8, 6, 10
---
Row 8:
- 8 + 9 = 17
- 8 + 7 = 15
- 8 + 8 = 16
- 8 + 6 = 14
- 8 + 2 = 10
- 8 + 4 = 12
- 8 + 10 = 18
- 8 + 3 = 11
- 8 + 1 = 9
- 8 + 5 = 13
→ Row 8: 17, 15, 16, 14, 10, 12, 18, 11, 9, 13
---
Row 9:
- 9 + 9 = 18
- 9 + 7 = 16
- 9 + 8 = 17
- 9 + 6 = 15
- 9 + 2 = 11
- 9 + 4 = 13
- 9 + 10 = 19
- 9 + 3 = 12
- 9 + 1 = 10
- 9 + 5 = 14
→ Row 9: 18, 16, 17, 15, 11, 13, 19, 12, 10, 14
---
Row 7:
- 7 + 9 = 16
- 7 + 7 = 14
- 7 + 8 = 15
- 7 + 6 = 13
- 7 + 2 = 9
- 7 + 4 = 11
- 7 + 10 = 17
- 7 + 3 = 10
- 7 + 1 = 8
- 7 + 5 = 12
→ Row 7: 16, 14, 15, 13, 9, 11, 17, 10, 8, 12
---
Now let’s write out the full completed grid for clarity:
```
+ | 9 7 8 6 2 4 10 3 1 5
----|-------------------------------
1 |10 8 9 7 3 5 11 4 2 6
10 |19 17 18 16 12 14 20 13 11 15
4 |13 11 12 10 6 8 14 7 5 9
6 |15 13 14 12 8 10 16 9 7 11
2 |11 9 10 8 4 6 12 5 3 7
3 |12 10 11 9 5 7 13 6 4 8
5 |14 12 13 11 7 9 15 8 6 10
8 |17 15 16 14 10 12 18 11 9 13
9 |18 16 17 15 11 13 19 12 10 14
7 |16 14 15 13 9 11 17 10 8 12
```
All calculations have been double-checked.
Final Answer:
The completed addition grid is as shown above. Each cell contains the sum of its row number and column number.
Parent Tip: Review the logic above to help your child master the concept of 1 minute math drills addition.