Mathematics Grade 3 worksheet - Free Printable

Let's solve each part of this Grade 3 mathematics worksheet step by step and explain the solutions.

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1. Write the number numeral:

We need to convert words into numerals.

| Word Form | Numeral |
|----------|--------|
| Seven hundred and twenty-one | 721 |
| Seven hundred and twenty-two | 722 |
| Seven hundred and twenty-three | 723 |
| Seven hundred and twenty-four | 724 |
| Seven hundred and twenty-five | 725 |
| Seven hundred and twenty-six | 726 |

✔ Answer:
721, 722, 723, 724, 725, 726

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2. Complete the sums:

#### a)
- 720 + 9 = 729
- 720 + 15 = 735
- 730 + 30 = 760

#### b) Fill in missing addends:
- 700 + ___ = 773 → 773 - 700 = 73
- 700 + ___ = 774 → 774 - 700 = 74
- 700 + ___ = 776 → 776 - 700 = 76

#### c)
- 770 + ___ = 790 → 790 - 770 = 20
- 770 + ___ = 780 → 780 - 770 = 10
- 770 + ___ = 792 → 792 - 770 = 22

#### d) Subtraction:
- 769 - 9 = 760
- 747 - 7 = 740
- 785 - 80 = 705

✔ Answers:
- 729, 735, 760
- 73, 74, 76
- 20, 10, 22
- 760, 740, 705

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3. Fill in the missing numbers:

Sequence: 700, 710, 720, ___, ___, ___, ___, ___, ___, ___

This is increasing by 10 each time.

So:
- 720 + 10 = 730
- 730 + 10 = 740
- 740 + 10 = 750
- 750 + 10 = 760
- 760 + 10 = 770
- 770 + 10 = 780

✔ Answer:
730, 740, 750, 760, 770, 780

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4. Decompose (breaking up numbers)

We break numbers into hundreds (H), tens (T), and units (U).

#### a) H + T + U = 793
Break down 793:
- Hundreds: 700
- Tens: 90
- Units: 3
So: 700 + 90 + 3 = 793

✔ Answer: 700 + 90 + 3

#### b) 700 + 90 + 2 = ?
Add: 700 + 90 = 790; 790 + 2 = 792

✔ Answer: 792

#### c) 8 + 40 + 700 = ?
Add: 8 + 40 = 48; 48 + 700 = 748

✔ Answer: 748

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5. Write the following numbers from smallest to biggest:

Numbers:
276, 444, 352, 177, 464, 575, 372, 193, 864, 762

Let’s sort them:

Start with smallest:
- 177
- 193
- 276
- 352
- 372
- 444
- 464
- 575
- 762
- 864

✔ Answer (in order):
177, 193, 276, 352, 372, 444, 464, 575, 762, 864

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6. Round off to the nearest 10

Use the rounding hill method (as shown in diagram):

- If the ones digit is 5 or more, round up.
- If less than 5, round down.

#### a) 623
- Ones digit: 3 → less than 5 → round down
→ 620

#### b) 625
- Ones digit: 5 → round up
→ 630

#### c) 547
- Ones digit: 7 → round up
→ 550

#### d) 636
- Ones digit: 6 → round up
→ 640

✔ Answers:
- 623 → 620
- 625 → 630
- 547 → 550
- 636 → 640

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✔ Final Answers Summary:

#### 1. Number numerals:
- 721, 722, 723, 724, 725, 726

#### 2. Sums:
- 729, 735, 760
- 73, 74, 76
- 20, 10, 22
- 760, 740, 705

#### 3. Missing numbers:
- 730, 740, 750, 760, 770, 780

#### 4. Decompose:
- 700 + 90 + 3 = 793
- 700 + 90 + 2 = 792
- 8 + 40 + 700 = 748

#### 5. Order numbers:
- 177, 193, 276, 352, 372, 444, 464, 575, 762, 864

#### 6. Round to nearest 10:
- 623 → 620
- 625 → 630
- 547 → 550
- 636 → 640

Let me know if you'd like this as a printable version or with explanations for younger learners!