math worksheets for grade 1 - Write the missing number - 4 - 7 - Free Printable

Let’s solve each row step by step. We’re looking for missing numbers in sequences that go up by 1 each time (counting forward).

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Row 1: 18 → ? → 20 → 21 → ?

- After 18 comes 19
- Then 20, then 21
- After 21 comes 22

✔ So: 18 → 19 → 20 → 21 → 22

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Row 2: ? → 26 → 27 → ? → 29

- Before 26 is 25
- After 27 is 28
- Then 29

✔ So: 25 → 26 → 27 → 28 → 29

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Row 3: 29 → ? → 31 → ? → 33

- After 29 is 30
- After 31 is 32
- Then 33

✔ So: 29 → 30 → 31 → 32 → 33

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Row 4: 28 → 29 → ? → 31 → ?

- After 29 is 30
- After 31 is 32

✔ So: 28 → 29 → 30 → 31 → 32

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Row 5: 27 → ? → 29 → 30 → ?

- After 27 is 28
- After 30 is 31

✔ So: 27 → 28 → 29 → 30 → 31

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Final Answer:
Row 1: 19, 22
Row 2: 25, 28
Row 3: 30, 32
Row 4: 30, 32
Row 5: 28, 31