Let me work through each number pattern step by step.
Pattern 1: 104, 113, 122, 131, 140 ...
First, I'll find the difference between consecutive numbers:
- 113 - 104 = 9
- 122 - 113 = 9
- 131 - 122 = 9
- 140 - 131 = 9
The pattern is adding 9 each time.
Next three numbers:
- 140 + 9 = 149
- 149 + 9 = 158
- 158 + 9 = 167
Pattern 2: 331, 316, 301, 286, 271 ...
Finding the differences:
- 316 - 331 = -15 (or 331 - 316 = 15)
- 301 - 316 = -15 (or 316 - 301 = 15)
- 286 - 301 = -15 (or 301 - 286 = 15)
- 271 - 286 = -15 (or 286 - 271 = 15)
The pattern is subtracting 15 each time.
Next three numbers:
- 271 - 15 = 256
- 256 - 15 = 241
- 241 - 15 = 226
Pattern 3: 890, 780, 670, 560, 450 ...
Finding the differences:
- 780 - 890 = -110 (or 890 - 780 = 110)
- 670 - 780 = -110 (or 780 - 670 = 110)
- 560 - 670 = -110 (or 670 - 560 = 110)
- 450 - 560 = -110 (or 560 - 450 = 110)
The pattern is subtracting 110 each time.
Next three numbers:
- 450 - 110 = 340
- 340 - 110 = 230
- 230 - 110 = 120
Let me verify my calculations:
Pattern 1: 140 + 9 = 149 ✓, 149 + 9 = 158 ✓, 158 + 9 = 167 ✓
Pattern 2: 271 - 15 = 256 ✓, 256 - 15 = 241 ✓, 241 - 15 = 226 ✓
Pattern 3: 450 - 110 = 340 ✓, 340 - 110 = 230 ✓, 230 - 110 = 120 ✓
All calculations check out!
Final Answer:
1. Next three numbers:
149, 158, 167
How I know: Each number increases by 9.
2. Next three numbers:
256, 241, 226
How I know: Each number decreases by 15.
3. Next three numbers:
340, 230, 120
How I know: Each number decreases by 110.
Parent Tip: Review the logic above to help your child master the concept of 4th grade pattern worksheet.
