Grade
2

Guess My Rule: Expression Sort

What’s the rule to be in the circle?

Inside the circle: 25 + 25 + 25, 85 minus 10, 48 + 27, and 7 tens + 5 ones. Outside the circle: 95 minus 15, 30 + 30 + 30, 5 tens + 7 ones, and 37 + 51.
  1. Some expressions belong in the circle, and some do not. What is the rule to be in the circle?
  2. Write at least one more example that belongs inside the circle.
  3. Write at least one more example that belongs outside the circle.

Make your own rule, using expressions. You can use the circle below or draw your own.
Write some examples that belong inside your circle and some examples that belong outside your circle.

blank circle with text, 'Rule for my circle:'
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Reference for Educators

Sample problems and solutions