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Division is often considered the hardest of the four basic operations to do mentally. However, in the UCAT, divisions tend to involve convenient numbers — you are dividing by 2, 4, 5, 8, 10, 20, 25, or 50 far more often than by 7 or 13. This lesson teaches shortcuts for the common divisors and strategies for handling the rest.
This is the reverse of the ×5 shortcut. Since ÷5 = ×2 ÷10:
| Calculation | ×2 | ÷10 | Answer |
|---|---|---|---|
| 350 ÷ 5 | 700 | 70 | 70 |
| 225 ÷ 5 | 450 | 45 | 45 |
| 1,480 ÷ 5 | 2,960 | 296 | 296 |
Since ÷25 = ×4 ÷100:
| Calculation | ×4 | ÷100 | Answer |
|---|---|---|---|
| 500 ÷ 25 | 2,000 | 20 | 20 |
| 375 ÷ 25 | 1,500 | 15 | 15 |
| 1,750 ÷ 25 | 7,000 | 70 | 70 |
Since ÷50 = ×2 ÷100:
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