Engaging Grade 2 math worksheet for practicing expanding numbers, featuring fun ocean-themed design and interactive exercises.

Problem Overview:

The worksheet is designed to help students practice expanding numbers and writing them in standard form. Here's a breakdown of the tasks:

1. Write the number in standard form: Combine the expanded parts (hundreds, tens, and ones) into a single number.
2. Write the expanded form of each number: Break down a given number into its hundreds, tens, and ones components.

Let’s solve each part step by step.

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Part 1: Write the number in standard form

#### Left Column:
1. 800 + 90 + 6 =
- Hundreds: 800
- Tens: 90
- Ones: 6
- Standard form: \( 800 + 90 + 6 = 896 \)

2. 600 + 20 + 3 =
- Hundreds: 600
- Tens: 20
- Ones: 3
- Standard form: \( 600 + 20 + 3 = 623 \)

3. 700 + 50 + 9 =
- Hundreds: 700
- Tens: 50
- Ones: 9
- Standard form: \( 700 + 50 + 9 = 759 \)

4. 900 + 80 + 5 =
- Hundreds: 900
- Tens: 80
- Ones: 5
- Standard form: \( 900 + 80 + 5 = 985 \)

5. 400 + 40 + 7 =
- Hundreds: 400
- Tens: 40
- Ones: 7
- Standard form: \( 400 + 40 + 7 = 447 \)

6. 100 + 10 + 2 =
- Hundreds: 100
- Tens: 10
- Ones: 2
- Standard form: \( 100 + 10 + 2 = 112 \)

#### Right Column:
1. 400 + 50 + 4 =
- Hundreds: 400
- Tens: 50
- Ones: 4
- Standard form: \( 400 + 50 + 4 = 454 \)

2. 900 + 60 + 7 =
- Hundreds: 900
- Tens: 60
- Ones: 7
- Standard form: \( 900 + 60 + 7 = 967 \)

3. 500 + 40 + 3 =
- Hundreds: 500
- Tens: 40
- Ones: 3
- Standard form: \( 500 + 40 + 3 = 543 \)

4. 300 + 10 + 1 =
- Hundreds: 300
- Tens: 10
- Ones: 1
- Standard form: \( 300 + 10 + 1 = 311 \)

5. 600 + 20 + 7 =
- Hundreds: 600
- Tens: 20
- Ones: 7
- Standard form: \( 600 + 20 + 7 = 627 \)

6. 300 + 90 + 6 =
- Hundreds: 300
- Tens: 90
- Ones: 6
- Standard form: \( 300 + 90 + 6 = 396 \)

---

Part 2: Write the expanded form of each number

#### Left Column:
1. 529 =
- Hundreds: 500
- Tens: 20
- Ones: 9
- Expanded form: \( 529 = 500 + 20 + 9 \)

2. 864 =
- Hundreds: 800
- Tens: 60
- Ones: 4
- Expanded form: \( 864 = 800 + 60 + 4 \)

3. 174 =
- Hundreds: 100
- Tens: 70
- Ones: 4
- Expanded form: \( 174 = 100 + 70 + 4 \)

4. 375 =
- Hundreds: 300
- Tens: 70
- Ones: 5
- Expanded form: \( 375 = 300 + 70 + 5 \)

5. 289 =
- Hundreds: 200
- Tens: 80
- Ones: 9
- Expanded form: \( 289 = 200 + 80 + 9 \)

#### Right Column:
1. 856 =
- Hundreds: 800
- Tens: 50
- Ones: 6
- Expanded form: \( 856 = 800 + 50 + 6 \)

2. 453 =
- Hundreds: 400
- Tens: 50
- Ones: 3
- Expanded form: \( 453 = 400 + 50 + 3 \)

3. 368 =
- Hundreds: 300
- Tens: 60
- Ones: 8
- Expanded form: \( 368 = 300 + 60 + 8 \)

4. 734 =
- Hundreds: 700
- Tens: 30
- Ones: 4
- Expanded form: \( 734 = 700 + 30 + 4 \)

5. 932 =
- Hundreds: 900
- Tens: 30
- Ones: 2
- Expanded form: \( 932 = 900 + 30 + 2 \)

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Final Answers:

#### Part 1: Standard Form
- Left Column:
1. 896
2. 623
3. 759
4. 985
5. 447
6. 112

- Right Column:
1. 454
2. 967
3. 543
4. 311
5. 627
6. 396

#### Part 2: Expanded Form
- Left Column:
1. 500 + 20 + 9
2. 800 + 60 + 4
3. 100 + 70 + 4
4. 300 + 70 + 5
5. 200 + 80 + 9

- Right Column:
1. 800 + 50 + 6
2. 400 + 50 + 3
3. 300 + 60 + 8
4. 700 + 30 + 4
5. 900 + 30 + 2

---

Boxed Final Answer:

\[
\boxed{
\begin{array}{ll}
\text{Standard Form (Left)}: & 896, 623, 759, 985, 447, 112 \\
\text{Standard Form (Right)}: & 454, 967, 543, 311, 627, 396 \\
\text{Expanded Form (Left)}: & 500+20+9, 800+60+4, 100+70+4, 300+70+5, 200+80+9 \\
\text{Expanded Form (Right)}: & 800+50+6, 400+50+3, 300+60+8, 700+30+4, 900+30+2 \\
\end{array}
}
\]