## Part One

## Lesson 2 – Number Work

**Solve the following examples.**

**1. Using any of these number cards make ten three-digit numbers and read them. **

**(Remember that you cannot have zero in the hundreds place.)**

**1, 2, 3, 4, 5, 6, 7, 8, 9, 0**

**(Remember that you cannot have zero in the hundreds place.)**

**Ans:** 123, 234, 345, 456, 567, 678, 789, 891, 912, 345

**2. Write the following numbers in words. **

**(1) 325 ****Ans:** Three hundred and twenty five

**(2) 549 ****Ans:** Five hundred and forty nine

**(3) 667 ****Ans:** Six hundred and sixty seven

**(4) 782 ****Ans:** Seven hundred and eighty two

**(5) 890 ****Ans:** Eight hundred and ninety

**(6) 401****Ans:** Four hundred and one

**3. Write the following numbers in figures.**

**(1) Hundred and two****Ans:** 102

**(2) Three hundred and twenty****Ans:** 320

**(3) Five hundred and sixty-seven ****Ans:** 567

**(4) Four hundred and forty-five ****Ans:** 445

**(5) Nine hundred and ninety-nine****Ans:** 999

**(6) Seven hundred and fifty-six****Ans:** 756

**4. Write the next three numbers.**

**(1) 399, ___, ___, ___****Ans:** 399, 400, 401, 402

**(2) 200, ___, ___, ___****Ans:** 200, 201, 202, 203

**(3) 597, ___, ___, ___****Ans:** 597, 598, 599, 600

**5. Write the three previous numbers.**

**(1) ___, ___, ___, 600****Ans:** 597, 598, 599, 600

**(2) ___, ___, ___, 369****Ans:** 366, 367, 368, 369

**(3) ___, ___, ___, 299****Ans:** 296, 297, 298, 299

**Look at the symbols. Write the number and read it.**

**Ans:**

**Exercise**

**1. Write the given numbers in figures.**

**Ans:**

**2. Read the numbers**

**Ans:**

1. 1001 – One thousand and one

2. 1010 – One thousand and ten

3. 1100 – One thousand one hundred

4. 2002 – Two thousand and two

5. 2020 – Two thousand and twenty

6. 2200 – Two thousand two hundred

7. 4004 – Four thousand and four

8. 4040 – Four thousand and forty

9. 4400 – Four thousand four hundred

10. 5051 – Five thousand and fifty-one

11. 5105 – Five thousand one hundred and five

12. 5150 – Five thousand one hundred and fifty

13. 5501 – Five thousand five hundred and one

14. 3067 – Three thousand and sixty-seven

15. 3607 – Three thousand six hundred and seven

16. 3670 – Three thousand six hundred and seventy

17. 3076 – Three thousand and seventy-six

18. 7038 – Seven thousand and thirty-eight

19. 7308 – Seven thousand three hundred and eight

20. 7083 – Seven thousand and eighty-three

21. 7830 – Seven thousand eight hundred and thirty

22. 9000 – Nine thousand

23. 9009 – Nine thousand and nine

24. 9090 – Nine thousand and ninety

25. 9900 – Nine thousand nine hundred

**3. Read the given numbers. Write them in words.**

**Ans:**

1. 1235 – One thousand two hundred and thirty-five

2. 2341 – Two thousand three hundred and forty-one

3. 3507 – Three thousand five hundred and seven

4. 4115 – Four thousand one hundred and fifteen

5. 5045 – Five thousand and forty-five

6. 6787 – Six thousand seven hundred and eighty-seven

7. 7890 – Seven thousand eight hundred and ninety

8. 8888 – Eight thousand eight hundred and eighty-eight

9. 9007 – Nine thousand and seven

**4. Using each digit only once, write five four-digit numbers and read them.**

**Ans:**

1. 2367 – Two thousand three hundred and sixty-seven

2. 2376 – Two thousand three hundred and seventy-six

3. 2637 – Two thousand six hundred and thirty-seven

4. 2673 – Two thousand six hundred and seventy-three

5. 2763 – Two thousand seven hundred and sixty-three

**Ans:**

1. 5980 – Five thousand nine hundred and eighty

2. 5809 – Five thousand eight hundred and nine

3. 9058 – Nine thousand fifty-eight

4. 8509 – Eight thousand five hundred and nine

5. 9085 – Nine thousand eighty-five

**5. On a number slate, write different four-digit numbers by changing, one at a time, digits in different places. Read each number**

**Ans:**

**Ans:**

**Read the following numbers and write them in words. **

**20,000 = Twenty thousand**

**80,000 **

**Ans:** Eighty thousand

**68,000 **

**Ans:** Sixty eight thousand

**54,000 **

**Ans:** Fifty four thousand

**79,000 **

**Ans:** Seventy nine thousand

**99,000**

**Ans:** Ninety nine thousand

**Exercise**

**1. Read the numbers, write them in figures.**

**(1) Forty thousand****Ans:** 40,000

**(2) Fifty thousand fifty****Ans:** 50,050

**(3) Twelve thousand, three hundred and thirteen****Ans:** 12,313

**(4) Forty-five thousand and three ****Ans:** 45,003

**(5) Twenty-three thousand, one hundred and five ****Ans:** 23,105

**(6) Sixty-eight thousand and five****Ans:** 68,005

**2. Read the numbers, write them in words. **

**(1) 52,045**

**Ans:** Fifty two thousand and forty-five.

**(2) 23,409**

**Ans:** Twenty three thousand, four hundred and nine.

**(3) 45,600**

**Ans:** Forty five thousand and six hundred.

**(4) 41,000**

**Ans:** Forty one thousand.

**(5) 99,999**

**Ans:** Ninety nine thousand, nine hundred and ninety nine.

**(6) 95,768**

**Ans:** Ninety five thousand, seven hundred and sixty eight.

**3. On the number slate alongside, write five numbers by changing the digits in the units, tens, hundreds, thousands and ten thousands places, one at a time. Read the numbers.**

**TTh Th H T U**

2 3 4 1 1

**Ans: **

1. 23411 – Twenty-three thousand four hundred and eleven

2. 42113 – Forty-two thousand one hundred and thirteen

3. 11324 – Eleven thousand three hundred and twenty-four

4. 34112 – Thirty-four thousand one hundred and twelve

5. 12314 – Twelve thousand three hundred and fourteen

**4. Using each of the digits 9, 5, 6, 1,8 only once, write six five-digit numbers.**

**Ans: **

1. 95618

2. 61859

3. 89516

4. 56189

5. 19856

6. 86591

**5. Write the biggest number that can be made using the digits 1, 5, 6, 4, 7**

**Ans: **The biggest number that can be made using the digits 1, 5, 6, 4, and 7 is 76541.

#### 6. Write two numbers by writing the digits 4, 3, 9, 8, 7 in the ascending and descending order.

**Ans: **

Ascending Order: 34789

Descending Order: 98743

#### 7. Keeping 7 in the unit’s place, use all the digits 6, 0, 7, 5, 4 to make five numbers. Write the numbers.

**Ans: **

1. 60747 – Sixty thousand seven hundred and forty-seven

2. 50477 – Fifty thousand four hundred and seventy-seven

3. 70457 – Seventy thousand four hundred and fifty-seven

4. 64707 – Sixty-four thousand seven hundred and seven

5. 57047 – Fifty-seven thousand forty-seven

#### 8. Write five numbers, keeping the smallest of 4, 9, 3, 5, 1 in the unit’s place.

**Ans: **

1. 43921 – Forty-three thousand nine hundred and twenty-one

2. 59371 – Fifty-nine thousand three hundred and seventy-one

3. 34981 – Thirty-four thousand nine hundred and eighty-one

4. 53491 – Fifty-three thousand four hundred and ninety-one

5. 91461 – Ninety-one thousand four hundred and sixty-one

**Exercise**

**1. Write the following numbers in the expanded form.**

**(1) 7,545****Ans:** 7,000 + 500 + 40 + 5

**(2) 4,050****Ans:** 4,050 = 4,000 + 0 + 50 + 9

**(3) 65,100****Ans:** 65,100 = 60,000 + 5,000 + 100 + 0 + 0

**(4) 8,000**

**Ans:** 8,000 + 0 + 0 + 0

**(5) 12,745**

**Ans:** 10,000 + 2,000 + 700 + 40 + 5

**(6) 78,999****Ans:** 70,000 + 8,000 + 900 + 90 + 9

**(7) 9,392****Ans:** 9,000 + 300 + 90 + 2

**(8) 50,105****Ans:** 50,000 + 0 + 100 + 0 + 5

**(9) 70,495****Ans:** 70,000 + 0 + 400 + 90 + 5

**(10) 82,727****Ans:** 80,000 + 2,000 + 700 + 20 + 7

**2. Write the numbers from their expanded form.**

**(1) 3,000 + 200 + 50 + 7 = 3,257**

**(2) 10,000 + 5,000 + 1 ****Ans:** 1501

**(3) 4,000 + 500 + 10 + 3****Ans:** 4,513

**(4) 20,000 + 300 + 40 +5 ****Ans:** 20,345

**(5) 7,000 + 80 + 3****Ans:** 7,084

**(6) 90,000 + 90 + 2****Ans:** 90,092

**3. Some digits and their places in the number are given below. Write down the numbers they make. **

#### For example:

5 TTh, 2Th, 3H, 2T, 1U – 52,321

9H, 8TTh, 5U – 80905

**(1) 7U, 2T, 5TTh, 9Th****Ans:** 59,027

**(2) 3H, 4Th, 5T, 1TTh****Ans:** 14,350

**(3) 5T, 8Th, 7TTh****Ans:** 78,050

**(4) 5Th, 7TTh, 3H, 2T, 4U****Ans:** 75,324

**Exercise**

**Write the place value of the underlined digit in the following numbers.**

**(1) 1,999**

**Ans:** 90

**(2) 2,345**

**Ans:** 2,000

**(3) 2,000 **

**Ans:** 0

**(4) 4,835**

**Ans:** 800

**(5) 3,749 **

**Ans:** 9

**(6) 27,859 **

**Ans:** 7,000

**(7) 67,777 **

**Ans:** 700

**(8) 56,708 **

**Ans:** 50,000

**(9) 30,050**

**Ans:** 0

**Exercise**

**Work out and write different breakups of the numbers given below.**

**(1) 679**

**Ans:**

Six hundred and seventy-nine units

Sixty seven tens, nine units

Six hundred, seven tens, nine units

**(2) 863**

**Ans: **

Eight hundred and sixty-three units

Eighty six tens, three units

Eight hundred, sixty tens, three units

**(3) 6745**

**Ans: **

Six thousand, seven hundred and forty-five units

Sixty seven hundred, four tens, five units

Six thousand, seventy four tens, five units

Six hundred and seventy four tens, and five units

**(4) 9856**

**Ans: **

Nine thousand, eight hundred and fifty-six units

Ninety eight hundred, five tens, six units

Nine thousand, eighty five tens, six units

Nine hundred and eighty-five tens, and six units

**(5) 1027**

**Ans: **

One thousand, twenty-seven units

Ten hundred, two tens, seven units

One thousand, two tens, seven units

One hundred and two tens, and seven units

**Exercise**

**Write the number just after and the number just before the given number.**

**Ans:**

**Exercise**

**Complete the following table.**

**Ans:**

**Exercise**

**Write the numbers in ascending and descending order.**

**(1) 2345, 2349, 2347**

**Ans: **

Ascending Order: 2345, 2347, 2349

Descending Order: 2349, 2347, 2345

**(2) 6000, 5070, 3007**

**Ans: **

Ascending Order: 3007, 5070, 6000

Descending Order: 6000, 5070, 3007

**(3) 5007, 2007, 3007**

**Ans: **

Ascending Order: 2007, 3007, 5007

Descending Order: 5007, 3007, 2007

**(4) 1009, 1900, 1090 **

**Ans: **

Ascending Order: 1090, 1009, 1900

Descending Order: 1900, 1009, 1090

**(5) 4180, 6180, 7180 **

**Ans: **

Ascending Order: 4180, 6180, 7180

Descending Order: 7180, 6180, 4180

**(6) 2917, 3456, 1357**

**Ans: **

Ascending Order: 1357, 2917, 3456

Descending Order: 3456, 2917, 1357

**See the digits in the units place and say whether the number is even or odd.**

#### 35, 67, 32, 30, 43, 34, 51, 56, 88, 79

**Ans: **

35: Odd Number

67: Odd Number

32: Even Number

30: Even Number

43: Odd Number

34: Even Number

51: Odd Number

56: Even Number

88: Even Number

79: Odd Number

**Exercise**

**1. Read the numbers given below and write them in words.**

**(1) 20,504**

**Ans:** Twenty thousand, five hundred and four

**(2) 97,487**

**Ans:** Ninety-seven thousand, four hundred and eighty-seven

**(3) 30,008**

**Ans:** Thirty thousand and eight

**(4) 4,879**

**Ans:** Four thousand, eight hundred and seventy-nine

**(5) 6,405**

**Ans:** Six thousand, four hundred and five

**(6) 893**

**Ans:** Eight hundred and ninety-three

**2. Where have you seen international numerals being used? **

**Ans:** International numerals, also known as Arabic numerals, are the numbers we use every day, like 1, 2, 3, and so on. We see them in books, on phones, on computers, and everywhere we count things like candies or toys. They are the numbers that make it easy for people all over the world to understand and use numbers together!

**3. Find prices of things written in Devanagari numerals and read them.**

**Ans:** *Students should do this on their own. *