Let’s solve each number pattern one by one. We’ll look at how the numbers change from left to right — are they going up or down? By how much? Then we’ll keep adding or subtracting that same amount to fill in the blanks.
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Problem 1: 2, 4, 6, 8, 10, __, __, __, __, __
Each number goes up by 2.
→ 10 + 2 = 12
→ 12 + 2 = 14
→ 14 + 2 = 16
→ 16 + 2 = 18
→ 18 + 2 = 20
Answer:
12, 14, 16, 18, 20
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Problem 2: 17, 19, 21, 23, 25, __, __, __, __, __
Again, each number goes up by 2.
→ 25 + 2 = 27
→ 27 + 2 = 29
→ 29 + 2 = 31
→ 31 + 2 = 33
→ 33 + 2 = 35
Answer:
27, 29, 31, 33, 35
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Problem 3: 48, 44, 40, 36, 32, __, __, __, __, __
Now the numbers are going DOWN by 4 each time.
→ 32 - 4 = 28
→ 28 - 4 = 24
→ 24 - 4 = 20
→ 20 - 4 = 16
→ 16 - 4 = 12
Answer:
28, 24, 20, 16, 12
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Problem 4: 10, 15, 20, 25, 30, __, __, __, __, __
Going UP by 5 each time.
→ 30 + 5 = 35
→ 35 + 5 = 40
→ 40 + 5 = 45
→ 45 + 5 = 50
→ 50 + 5 = 55
Answer:
35, 40, 45, 50, 55
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Problem 5: 27, 25, 23, 21, 19, __, __, __, __, __
Going DOWN by 2 each time.
→ 19 - 2 = 17
→ 17 - 2 = 15
→ 15 - 2 = 13
→ 13 - 2 = 11
→ 11 - 2 = 9
Answer:
17, 15, 13, 11, 9
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Problem 6: 6, 12, 18, 24, 30, __, __, __, __, __
Going UP by 6 each time.
→ 30 + 6 = 36
→ 36 + 6 = 42
→ 42 + 6 = 48
→ 48 + 6 = 54
→ 54 + 6 = 60
Answer:
36, 42, 48, 54, 60
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Problem 7: 1, 3, 5, 7, 9, __, __, __, __, __
Odd numbers! Going UP by 2.
→ 9 + 2 = 11
→ 11 + 2 = 13
→ 13 + 2 = 15
→ 15 + 2 = 17
→ 17 + 2 = 19
Answer:
11, 13, 15, 17, 19
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Problem 8: 40, 38, 36, 34, 32, __, __, __, __, __
Going DOWN by 2.
→ 32 - 2 = 30
→ 30 - 2 = 28
→ 28 - 2 = 26
→ 26 - 2 = 24
→ 24 - 2 = 22
Answer:
30, 28, 26, 24, 22
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Problem 9: 12, 15, 18, 21, 24, __, __, __, __, __
Going UP by 3.
→ 24 + 3 = 27
→ 27 + 3 = 30
→ 30 + 3 = 33
→ 33 + 3 = 36
→ 36 + 3 = 39
Answer:
27, 30, 33, 36, 39
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Problem 10: 32, 30, 28, 26, 24, __, __, __, __, __
Going DOWN by 2.
→ 24 - 2 = 22
→ 22 - 2 = 20
→ 20 - 2 = 18
→ 18 - 2 = 16
→ 16 - 2 = 14
Answer:
22, 20, 18, 16, 14
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Final Answer:
1) 12, 14, 16, 18, 20
2) 27, 29, 31, 33, 35
3) 28, 24, 20, 16, 12
4) 35, 40, 45, 50, 55
5) 17, 15, 13, 11, 9
6) 36, 42, 48, 54, 60
7) 11, 13, 15, 17, 19
8) 30, 28, 26, 24, 22
9) 27, 30, 33, 36, 39
10) 22, 20, 18, 16, 14
Parent Tip: Review the logic above to help your child master the concept of math patterns worksheet grade 4.
