Math - Numbers & Operations - Place Value - Common Core State ... - Free Printable

Let's solve the Number Sense Review worksheet step by step. The worksheet includes several types of problems: identifying odd/even numbers, comparing numbers, addition, place value, standard form, and word problems involving addition and subtraction.

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Part 1: Odd or Even

Identify whether each number is odd or even.

1. 145 → ends in 5 → odd
2. 1,715 → ends in 5 → odd
3. 23,171 → ends in 1 → odd
4. 21 → ends in 1 → odd
5. 100 → ends in 0 → even
6. 295 → ends in 5 → odd
7. 81 → ends in 1 → odd
8. 7,800 → ends in 0 → even

✔ Answers:
1. odd
2. odd
3. odd
4. odd
5. even
6. odd
7. odd
8. even

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Part 2: Compare Numbers Using <, >, or =

Compare the pairs:

9. 81 ___ 76 → 81 > 76 → >
10. 125 ___ 251 → 125 < 251 → <
11. 1,100 ___ 3,897 → 1,100 < 3,897 → <
12. 45 ___ 54 → 45 < 54 → <

✔ Answers:
9. >
10. <
11. <
12. <

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Part 3: Addition Problems

Add the following:

13. 45 + 32 = 77
14. 79 + 41 = 120
15. 157 + 81 = 238
16. 568 + 81 = 649
17. 37 + 84 = 121

✔ Answers:
13. 77
14. 120
15. 238
16. 649
17. 121

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Part 4: Place Value of Underlined Digit

18. 31,871 – underlined digit is 8 (in the hundreds place) → hundreds
19. 215 – underlined digit is 1 (tens place) → tens
20. 319,257 – underlined digit is 9 (thousands place) → thousands
21. 7,213 – underlined digit is 2 (hundreds place) → hundreds

✔ Answers:
18. hundreds
19. tens
20. thousands
21. hundreds

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Part 5: Write in Standard Form

22. One thousand, seven hundred, ninety-three → 1,793
23. Two hundred, sixty-seven → 267
24. Four hundred four → 404
25. Six thousand, one hundred, sixteen → 6,116

✔ Answers:
22. 1,793
23. 267
24. 404
25. 6,116

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Part 6: Word Problems

26. What is 100 more than 2,795?
→ 2,795 + 100 = 2,895

27. What is 100 less than 180?
→ 180 - 100 = 80

28. What is 200 less than 150?
→ 150 - 200 = -50

✔ Answers:
26. 2,895
27. 80
28. -50

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✔ Final Answer Key Summary:

| # | Answer |
|---|--------|
| 1 | odd |
| 2 | odd |
| 3 | odd |
| 4 | odd |
| 5 | even |
| 6 | odd |
| 7 | odd |
| 8 | even |
| 9 | > |
|10 | < |
|11 | < |
|12 | < |
|13 | 77 |
|14 | 120 |
|15 | 238 |
|16 | 649 |
|17 | 121 |
|18 | hundreds |
|19 | tens |
|20 | thousands |
|21 | hundreds |
|22 | 1,793 |
|23 | 267 |
|24 | 404 |
|25 | 6,116 |
|26 | 2,895 |
|27 | 80 |
|28 | -50 |

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🔍 Explanation:

- Odd/Even: A number is even if it ends in 0, 2, 4, 6, or 8; otherwise, it’s odd.
- Comparing Numbers: Look at digits from left to right to determine which number is greater.
- Addition: Align numbers properly and add column by column.
- Place Value: Identify the position of the digit (ones, tens, hundreds, etc.).
- Standard Form: Convert words into numerals.
- Word Problems: Add or subtract based on the question.

This worksheet helps build foundational number sense skills like understanding place value, basic operations, and number comparison.

Let me know if you'd like a printable version or a PDF! 😊