Worked examples
Two examples
Example 1
4 × 7 =
- Double 7 is 14, and double that is 28.
Answer: 28
Example 2
5 × 9 =
- 10 × 9 = 90, and half of that is 45.
Answer: 45
Where this is taught: Times Tables for Grown-Ups
The drill
Ten problems
How many:
Type each answer, then press Check my answers at the bottom. Commas in large numbers are fine.Write each answer on the line. The answer key, with the reasoning, is on the last page.