Worked examples
Two examples
Example 1
132 =
- 13 × 13 = 169.
Answer: 169
Example 2
182 =
- 18 × 18 = 324.
Answer: 324
Where this is taught: Squares, Roots, and Powers, “The twenty squares, and their roots”
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.