What this printable includes
Find all positive whole-number factor pairs for eight numbers. Each practice item has room to list pairs, and the separate answer page shows a complete set. This is different from a multiplication facts drill because the learner must decide when every pair has been found.
How to use the page
Start with one times the number, then test possible smaller factors in order. For twelve, the pairs are one and twelve, two and six, and three and four. Once the smaller factor would exceed the larger factor, the pairs begin to repeat. Record a square pair only once.
Review and adapt
Check each listed pair by multiplication and check the list for missing pairs. The worksheet asks for positive integer factors only, so negative pairs and fractional factors are outside its scope. If a learner stops too early, compare the smaller factors tested rather than simply copying the key.
Answer key in text
- 12: 1 × 12; 2 × 6; 3 × 4.
- 18: 1 × 18; 2 × 9; 3 × 6.
- 20: 1 × 20; 2 × 10; 4 × 5.
- 24: 1 × 24; 2 × 12; 3 × 8; 4 × 6.
- 30: 1 × 30; 2 × 15; 3 × 10; 5 × 6.
- 36: 1 × 36; 2 × 18; 3 × 12; 4 × 9; 6 × 6.
- 42: 1 × 42; 2 × 21; 3 × 14; 6 × 7.
- 48: 1 × 48; 2 × 24; 3 × 16; 4 × 12; 6 × 8.
Printable answer page
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