Math worksheet for converting expanded form to standard form, suitable for classroom use.

Let's solve each problem by adding all the numbers in the expanded form and writing the result in standard form (i.e., as a single number).

We'll go through each one step by step.

---

1)

600,000,000,000 + 80,000,000,000 + 5,000,000,000 + 500,000,000 +
40,000,000 + 2,000,000 + 300,000 + 90,000 + 6,000 + 300 + 90 + 7

Break it down:

- 600,000,000,000
- + 80,000,000,000 → 680,000,000,000
- + 5,000,000,000 → 685,000,000,000
- + 500,000,000 → 685,500,000,000
- + 40,000,000 → 685,540,000,000
- + 2,000,000 → 685,542,000,000
- + 300,000 → 685,542,300,000
- + 90,000 → 685,542,390,000
- + 6,000 → 685,542,396,000
- + 300 → 685,542,396,300
- + 90 → 685,542,396,390
- + 7 → 685,542,396,397

✔ Answer: 685,542,396,397

---

2)

900,000,000,000 + 30,000,000,000 + 2,000,000,000 + 600,000,000 +
30,000,000 + 4,000,000 + 300,000 + 80,000 + 7,000 + 600 + 50 + 9

Add step by step:

- 900,000,000,000
- + 30,000,000,000 → 930,000,000,000
- + 2,000,000,000 → 932,000,000,000
- + 600,000,000 → 932,600,000,000
- + 30,000,000 → 932,630,000,000
- + 4,000,000 → 932,634,000,000
- + 300,000 → 932,634,300,000
- + 80,000 → 932,634,380,000
- + 7,000 → 932,634,387,000
- + 600 → 932,634,387,600
- + 50 → 932,634,387,650
- + 9 → 932,634,387,659

✔ Answer: 932,634,387,659

---

3)

300,000,000,000 + 50,000,000,000 + 5,000,000,000 + 800,000,000 +
20,000,000 + 2,000,000 + 400,000 + 70,000 + 7,000 + 800 + 20 + 6

Step-by-step:

- 300,000,000,000
- + 50,000,000,000 → 350,000,000,000
- + 5,000,000,000 → 355,000,000,000
- + 800,000,000 → 355,800,000,000
- + 20,000,000 → 355,820,000,000
- + 2,000,000 → 355,822,000,000
- + 400,000 → 355,822,400,000
- + 70,000 → 355,822,470,000
- + 7,000 → 355,822,477,000
- + 800 → 355,822,477,800
- + 20 → 355,822,477,820
- + 6 → 355,822,477,826

✔ Answer: 355,822,477,826

---

4)

700,000,000,000 + 50,000,000,000 + 5,000,000,000 + 200,000,000 +
70,000,000 + 4,000,000 + 500,000 + 70,000 + 8,000 + 400 + 50 + 4

Step-by-step:

- 700,000,000,000
- + 50,000,000,000 → 750,000,000,000
- + 5,000,000,000 → 755,000,000,000
- + 200,000,000 → 755,200,000,000
- + 70,000,000 → 755,270,000,000
- + 4,000,000 → 755,274,000,000
- + 500,000 → 755,274,500,000
- + 70,000 → 755,274,570,000
- + 8,000 → 755,274,578,000
- + 400 → 755,274,578,400
- + 50 → 755,274,578,450
- + 4 → 755,274,578,454

✔ Answer: 755,274,578,454

---

5)

800,000,000,000 + 50,000,000,000 + 8,000,000,000 + 100,000,000 +
50,000,000 + 5,000,000 + 500,000 + 70,000 + 7,000 + 200 + 50 + 4

Step-by-step:

- 800,000,000,000
- + 50,000,000,000 → 850,000,000,000
- + 8,000,000,000 → 858,000,000,000
- + 100,000,000 → 858,100,000,000
- + 50,000,000 → 858,150,000,000
- + 5,000,000 → 858,155,000,000
- + 500,000 → 858,155,500,000
- + 70,000 → 858,155,570,000
- + 7,000 → 858,155,577,000
- + 200 → 858,155,577,200
- + 50 → 858,155,577,250
- + 4 → 858,155,577,254

✔ Answer: 858,155,577,254

---

6)

900,000,000,000 + 80,000,000,000 + 1,000,000,000 + 100,000,000 +
80,000,000 + 3,000,000 + 400,000 + 30,000 + 4,000 + 100 + 50 + 4

Step-by-step:

- 900,000,000,000
- + 80,000,000,000 → 980,000,000,000
- + 1,000,000,000 → 981,000,000,000
- + 100,000,000 → 981,100,000,000
- + 80,000,000 → 981,180,000,000
- + 3,000,000 → 981,183,000,000
- + 400,000 → 981,183,400,000
- + 30,000 → 981,183,430,000
- + 4,000 → 981,183,434,000
- + 100 → 981,183,434,100
- + 50 → 981,183,434,150
- + 4 → 981,183,434,154

✔ Answer: 981,183,434,154

---

7)

500,000,000,000 + 90,000,000,000 + 9,000,000,000 + 900,000,000 +
50,000,000 + 1,000,000 + 300,000 + 80,000 + 4,000 + 500 + 60 + 9

Step-by-step:

- 500,000,000,000
- + 90,000,000,000 → 590,000,000,000
- + 9,000,000,000 → 599,000,000,000
- + 900,000,000 → 599,900,000,000
- + 50,000,000 → 599,950,000,000
- + 1,000,000 → 599,951,000,000
- + 300,000 → 599,951,300,000
- + 80,000 → 599,951,380,000
- + 4,000 → 599,951,384,000
- + 500 → 599,951,384,500
- + 60 → 599,951,384,560
- + 9 → 599,951,384,569

✔ Answer: 599,951,384,569

---

8)

900,000,000,000 + 80,000,000,000 + 4,000,000,000 + 200,000,000 +
60,000,000 + 4,000,000 + 400,000 + 80,000 + 3,000 + 500 + 20 + 8

Step-by-step:

- 900,000,000,000
- + 80,000,000,000 → 980,000,000,000
- + 4,000,000,000 → 984,000,000,000
- + 200,000,000 → 984,200,000,000
- + 60,000,000 → 984,260,000,000
- + 4,000,000 → 984,264,000,000
- + 400,000 → 984,264,400,000
- + 80,000 → 984,264,480,000
- + 3,000 → 984,264,483,000
- + 500 → 984,264,483,500
- + 20 → 984,264,483,520
- + 8 → 984,264,483,528

✔ Answer: 984,264,483,528

---

9)

900,000,000,000 + 80,000,000,000 + 8,000,000,000 + 900,000,000 +
80,000,000 + 1,000,000 + 600,000 + 10,000 + 3,000 + 100 + 80 + 3

Step-by-step:

- 900,000,000,000
- + 80,000,000,000 → 980,000,000,000
- + 8,000,000,000 → 988,000,000,000
- + 900,000,000 → 988,900,000,000
- + 80,000,000 → 988,980,000,000
- + 1,000,000 → 988,981,000,000
- + 600,000 → 988,981,600,000
- + 10,000 → 988,981,610,000
- + 3,000 → 988,981,613,000
- + 100 → 988,981,613,100
- + 80 → 988,981,613,180
- + 3 → 988,981,613,183

✔ Answer: 988,981,613,183

---

10)

900,000,000,000 + 70,000,000,000 + 1,000,000,000 + 700,000,000 +
60,000,000 + 4,000,000 + 800,000 + 90,000 + 7,000 + 600 + 60 + 7

Step-by-step:

- 900,000,000,000
- + 70,000,000,000 → 970,000,000,000
- + 1,000,000,000 → 971,000,000,000
- + 700,000,000 → 971,700,000,000
- + 60,000,000 → 971,760,000,000
- + 4,000,000 → 971,764,000,000
- + 800,000 → 971,764,800,000
- + 90,000 → 971,764,890,000
- + 7,000 → 971,764,897,000
- + 600 → 971,764,897,600
- + 60 → 971,764,897,660
- + 7 → 971,764,897,667

✔ Answer: 971,764,897,667

---

11)

700,000,000,000 + 10,000,000,000 + 1,000,000,000 + 600,000,000 +
50,000,000 + 2,000,000 + 200,000 + 70,000 + 8,000 + 600 + 10 + 9

Step-by-step:

- 700,000,000,000
- + 10,000,000,000 → 710,000,000,000
- + 1,000,000,000 → 711,000,000,000
- + 600,000,000 → 711,600,000,000
- + 50,000,000 → 711,650,000,000
- + 2,000,000 → 711,652,000,000
- + 200,000 → 711,652,200,000
- + 70,000 → 711,652,270,000
- + 8,000 → 711,652,278,000
- + 600 → 711,652,278,600
- + 10 → 711,652,278,610
- + 9 → 711,652,278,619

✔ Answer: 711,652,278,619

---

12)

600,000,000,000 + 30,000,000,000 + 2,000,000,000 + 800,000,000 +
90,000,000 + 8,000,000 + 700,000 + 70,000 + 4,000 + 300 + 50 + 4

Step-by-step:

- 600,000,000,000
- + 30,000,000,000 → 630,000,000,000
- + 2,000,000,000 → 632,000,000,000
- + 800,000,000 → 632,800,000,000
- + 90,000,000 → 632,890,000,000
- + 8,000,000 → 632,898,000,000
- + 700,000 → 632,898,700,000
- + 70,000 → 632,898,770,000
- + 4,000 → 632,898,774,000
- + 300 → 632,898,774,300
- + 50 → 632,898,774,350
- + 4 → 632,898,774,354

✔ Answer: 632,898,774,354

---

13)

200,000,000,000 + 40,000,000,000 + 8,000,000,000 + 700,000,000 +
60,000,000 + 5,000,000 + 500,000 + 70,000 + 1,000 + 900 + 50 + 0

Step-by-step:

- 200,000,000,000
- + 40,000,000,000 → 240,000,000,000
- + 8,000,000,000 → 248,000,000,000
- + 700,000,000 → 248,700,000,000
- + 60,000,000 → 248,760,000,000
- + 5,000,000 → 248,765,000,000
- + 500,000 → 248,765,500,000
- + 70,000 → 248,765,570,000
- + 1,000 → 248,765,571,000
- + 900 → 248,765,571,900
- + 50 → 248,765,571,950
- + 0 → 248,765,571,950

✔ Answer: 248,765,571,950

---

14)

400,000,000,000 + 60,000,000,000 + 9,000,000,000 + 800,000,000 +
90,000,000 + 4,000,000 + 900,000 + 60,000 + 1,000 + 900 + 20 + 0

Step-by-step:

- 400,000,000,000
- + 60,000,000,000 → 460,000,000,000
- + 9,000,000,000 → 469,000,000,000
- + 800,000,000 → 469,800,000,000
- + 90,000,000 → 469,890,000,000
- + 4,000,000 → 469,894,000,000
- + 900,000 → 469,894,900,000
- + 60,000 → 469,894,960,000
- + 1,000 → 469,894,961,000
- + 900 → 469,894,961,900
- + 20 → 469,894,961,920
- + 0 → 469,894,961,920

✔ Answer: 469,894,961,920

---

15)

700,000,000,000 + 50,000,000,000 + 7,000,000,000 + 600,000,000 +
10,000,000 + 9,000,000 + 700,000 + 60,000 + 8,000 + 300 + 10 + 4

Step-by-step:

- 700,000,000,000
- + 50,000,000,000 → 750,000,000,000
- + 7,000,000,000 → 757,000,000,000
- + 600,000,000 → 757,600,000,000
- + 10,000,000 → 757,610,000,000
- + 9,000,000 → 757,619,000,000
- + 700,000 → 757,619,700,000
- + 60,000 → 757,619,760,000
- + 8,000 → 757,619,768,000
- + 300 → 757,619,768,300
- + 10 → 757,619,768,310
- + 4 → 757,619,768,314

✔ Answer: 757,619,768,314

---

## ✔ Final Answers:

| Number | Standard Form |
|--------|----------------|
| 1) | 685,542,396,397 |
| 2) | 932,634,387,659 |
| 3) | 355,822,477,826 |
| 4) | 755,274,578,454 |
| 5) | 858,155,577,254 |
| 6) | 981,183,434,154 |
| 7) | 599,951,384,569 |
| 8) | 984,264,483,528 |
| 9) | 988,981,613,183 |
| 10) | 971,764,897,667 |
| 11) | 711,652,278,619 |
| 12) | 632,898,774,354 |
| 13) | 248,765,571,950 |
| 14) | 469,894,961,920 |
| 15) | 757,619,768,314 |

---

💡 Explanation:
Each problem gives a number in expanded form, where each digit is broken down into its place value (e.g., hundreds of millions, tens of thousands, etc.). To write in standard form, we add all these values together to get the full number.

For example:
> 600,000,000,000 + 80,000,000,000 = 680,000,000,000
Then continue adding smaller parts...

This helps students understand place value and how large numbers are constructed.

Let me know if you'd like this formatted for printing or as a PDF!