Home/Fourth Grade Math/Week 10: Number patterns/Lesson 1
K-5 friendly lesson
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Use a rule to complete a number pattern

Patterns are number stories. Find the rule, then keep the story going.

Lesson 1

Concept

Every pattern has a rule. šŸ§© Types of rules: - Add the same number each time (+4, +50, +0.3) - Subtract the same number each time - Multiply by the same factor (Ɨ2, Ɨ3) - Alternate operations (+5, -2, +5, -2) Example A: 12, 17, 22, 27, __, __ Rule is +5 ā†’ next terms: 32, 37 Example B: 1, 3, 9, 27, __ Rule is Ɨ3 ā†’ next term: 81 šŸ§  Check your rule on at least 3 jumps before finalizing.

Try it

Find the rule and complete. 1. 240, 340, 440, 540, __, __ 2. 95, 90, 85, 80, __, __ 3. 4, 8, 16, 32, __ 4. 200, 205, 203, 208, 206, __, __ Create your own: 5. Write a pattern with rule +25 for six terms. 6. Write a pattern with rule Ɨ2 for five terms. Challenge: 7. Give two different rules that start with 5 and include 20 as a later term.