Let's solve each of the number pattern problems step by step.
---
Problem 1:
Pattern: 104, 113, 122, 131, 140 ...
#### Step 1: Find the difference between consecutive numbers:
- 113 - 104 =
9
- 122 - 113 =
9
- 131 - 122 =
9
- 140 - 131 =
9
✔ The pattern increases by
9 each time.
#### Step 2: Add 9 to find the next three numbers:
- 140 + 9 =
149
- 149 + 9 =
158
- 158 + 9 =
167
✔ Next three numbers:
149, 158, 167
#### Explanation:
I know which numbers come next because each number increases by
9 from the previous one. This is an
arithmetic sequence with a common difference of 9.
---
Problem 2:
Pattern: 331, 316, 301, 286, 271 ...
#### Step 1: Find the difference between consecutive numbers:
- 316 - 331 =
-15
- 301 - 316 =
-15
- 286 - 301 =
-15
- 271 - 286 =
-15
✔ The pattern decreases by
15 each time.
#### Step 2: Subtract 15 to find the next three numbers:
- 271 - 15 =
256
- 256 - 15 =
241
- 241 - 15 =
226
✔ Next three numbers:
256, 241, 226
#### Explanation:
I know which numbers come next because each number decreases by
15 from the previous one. This is an
arithmetic sequence with a common difference of -15.
---
Problem 3:
Pattern: 890, 780, 670, 560, 450 ...
#### Step 1: Find the difference between consecutive numbers:
- 780 - 890 =
-110
- 670 - 780 =
-110
- 560 - 670 =
-110
- 450 - 560 =
-110
✔ The pattern decreases by
110 each time.
#### Step 2: Subtract 110 to find the next three numbers:
- 450 - 110 =
340
- 340 - 110 =
230
- 230 - 110 =
120
✔ Next three numbers:
340, 230, 120
#### Explanation:
I know which numbers come next because each number decreases by
110 from the previous one. This is an
arithmetic sequence with a common difference of -110.
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✔ Final Answers:
1. Next three numbers:
149, 158, 167
→ Pattern increases by 9.
2. Next three numbers:
256, 241, 226
→ Pattern decreases by 15.
3. Next three numbers:
340, 230, 120
→ Pattern decreases by 110.
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Parent Tip: Review the logic above to help your child master the concept of pattern worksheet for 4th grade.