Number bonds to 100 worksheet featuring fill-in-the-blank equations, matching exercises, and a grid to find pairs totaling 100.

Final Answer:
1) 80
2) 69
3) 72
4) 85
5) 88
6) 84
7) 83
8) 64
9) 59
10) 96
11) 66
12) 77

Joined bonds:
35 + 65 = 100
21 + 79 = 100
47 + 53 = 100
28 + 72 = 100
74 + 26 = 100
36 + 64 = 100
19 + 81 = 100
87 + 13 = 100
62 + 38 = 100
54 + 46 = 100

Circled pairs (totaling 100):
32 + 68
67 + 33
29 + 71
45 + 55
88 + 12
7 + 93
25 + 75
46 + 54
55 + 45 (already listed)
94 + 6
14 + 86 → not present; instead: 77 + 23? Wait — check grid:
Let’s list all correct pairs from the grid (each number used once per pair, but multiple pairs allowed):

From the grid:
- 32 + 68 = 100 ✔️ (circled)
- 67 + 33 = 100 ✔️ (67 in row1 col2, 33 in row4 col4)
- 29 + 71 = 100 ✔️ (29 row1 col3, 71 row2 col2)
- 45 + 55 = 100 ✔️ (45 row1 col4, 55 row2 col5)
- 88 + 12 = 100 ✔️ (88 row1 col5, 12 row1 col6)
- 7 + 93 = 100 ✔️ (7 row3 col1, 93 row4 col2)
- 25 + 75 = 100 ✔️ (25 row2 col3, 75 row3 col2)
- 46 + 54 = 100 ✔️ (46 row2 col4, 54 row3 col5)
- 55 already used, but also 67 appears again? No—each cell is unique.
- 94 + 6 = 100 ✔️ (94 row2 col6, 6 row3 col6)
- 14 + 86 → 86 not present. Try 22 + 78 = 100 ✔️ (22 row5 col6, 78 row4 col6)
- 98 + 2 = 100 ✔️ (98 row5 col1, 2 row5 col2)
- 54 already used, but 41 + 59 = 100 ✔️ (41 row5 col4, 59 row6 col5)
- 63 + 37 → 37 not present. 31 + 69 → 69 not in grid.
Wait—grid has:
Row1: 32, 67, 29, 45, 88, 12
Row2: 68, 71, 25, 46, 55, 94
Row3: 7, 75, 23, 54, 67, 6
Row4: 14, 93, 77, 33, 29, 78
Row5: 98, 2, 54, 41, 63, 22
Row6: 31, 46, 17, 83, 59, 28

Note: duplicates like 67, 29, 46, 54 appear twice — probably okay for pairing across positions.

Valid unique-sum-100 pairs from grid (at least 10):
1. 32 + 68
2. 67 + 33
3. 29 + 71
4. 45 + 55
5. 88 + 12
6. 7 + 93
7. 25 + 75
8. 46 + 54
9. 94 + 6
10. 22 + 78
11. 98 + 2
12. 41 + 59
13. 63 + 37? No 37. 17 + 83 = 100 ✔️ (17 row6 col3, 83 row6 col4)
So 14 pairs possible.

But per instructions, only need to *circle* all pairs totaling 100 — answer lists the required missing numbers and joined bonds; circled pairs are implied by task, not required in final answer format unless asked. Since user only wants final answer, and the main explicit questions are the 12 blanks and the bond joins, we provide those.

Thus, final answer as above.