Number Bonds › to 100
Number Bonds to 100
Every pair that makes 100, shown visually, plus quick practice and a printable worksheet.
Number bonds to 100 (in fives)
100
0
100
100
5
95
100
10
90
100
15
85
100
20
80
100
25
75
100
30
70
100
35
65
100
40
60
100
45
55
100
50
50
All the pairs
| Number | Partner | Bond |
|---|---|---|
| 0 | 100 | 0 + 100 = 100 |
| 5 | 95 | 5 + 95 = 100 |
| 10 | 90 | 10 + 90 = 100 |
| 15 | 85 | 15 + 85 = 100 |
| 20 | 80 | 20 + 80 = 100 |
| 25 | 75 | 25 + 75 = 100 |
| 30 | 70 | 30 + 70 = 100 |
| 35 | 65 | 35 + 65 = 100 |
| 40 | 60 | 40 + 60 = 100 |
| 45 | 55 | 45 + 55 = 100 |
| 50 | 50 | 50 + 50 = 100 |
| 55 | 45 | 55 + 45 = 100 |
| 60 | 40 | 60 + 40 = 100 |
| 65 | 35 | 65 + 35 = 100 |
| 70 | 30 | 70 + 30 = 100 |
| 75 | 25 | 75 + 25 = 100 |
| 80 | 20 | 80 + 20 = 100 |
| 85 | 15 | 85 + 15 = 100 |
| 90 | 10 | 90 + 10 = 100 |
| 95 | 5 | 95 + 5 = 100 |
| 100 | 0 | 100 + 0 = 100 |
Tips
- Start with tens: 30 + 70 = 100 because 3 + 7 = 10.
- For numbers ending in 5, the partner ends in 5: 35 + 65.
- For any number, make the next ten first, then the jump to 100: 38 → 40 (2), 40 → 100 (60), so 38 + 62 = 100.
Practice
Find the missing number · 0 right · streak 0
Print a worksheet (20 questions)
Number bonds to 100 worksheet
Name: ____________________
Questions
What are number bonds to 100?
Pairs of numbers that add up to 100, such as 5 + 95.
How many number bonds to 100 are there?
21 pairs in steps of 5, from 0 + 100 to 100 + 0, counting each order separately.