Class 4 Math Worksheets Part 1 -CBSE/ICSE: Buy Class 4 Math ... - Free Printable

Problem Analysis:

The worksheet focuses on number systems and involves three main tasks:
1. Writing numbers in words.
2. Converting numbers written in words back to numerical form.
3. Arranging numbers in descending order.

Let's solve each section step by step.

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Section 1: Write the following numbers in words

#### Task:
Convert the given numbers into their word forms.

#### Numbers:
1. 60,670
2. 87,783
3. 52,215
4. 12,240
5. 31,861

#### Solution:
1. 60,670: Sixty thousand six hundred seventy.
2. 87,783: Eighty-seven thousand seven hundred eighty-three.
3. 52,215: Fifty-two thousand two hundred fifteen.
4. 12,240: Twelve thousand two hundred forty.
5. 31,861: Thirty-one thousand eight hundred sixty-one.

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Section 2: Write the following numbers in words

#### Task:
Convert the given word forms back into numerical form.

#### Word Forms:
6. Sixty-six thousand seven hundred thirty-one
7. Ninety-eight thousand six hundred eighty-one
8. Ninety-five thousand one hundred forty-one
9. Fifty-four thousand one hundred sixty-five
10. Ninety-two thousand seven hundred twenty-seven

#### Solution:
6. Sixty-six thousand seven hundred thirty-one: 66,731
7. Ninety-eight thousand six hundred eighty-one: 98,681
8. Ninety-five thousand one hundred forty-one: 95,141
9. Fifty-four thousand one hundred sixty-five: 54,165
10. Ninety-two thousand seven hundred twenty-seven: 92,727

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Section 3: Arrange the following numbers in descending order

#### Task:
Arrange the given sets of numbers in descending order (from largest to smallest).

#### Sets of Numbers:
11. 81,873; 20,146; 32,440; 28,515; 34,305; 30,298
12. 77,142; 77,854; 74,901; 53,136; 13,522; 71,902
13. 71,435; 63,791; 24,488; 64,507; 51,762; 92,574
14. 53,899; 98,212; 36,129; 40,371; 75,072
15. 54,007; 33,900; 15,195; 29,182; 64,662; 30,702
16. 85,484; 80,978; 11,983; 19,856; 86,222; 68,004
17. 11,284; 95,857; 19,856; 47,276; 91,725; 33,863
18. 70,718; 70,903; 92,877; 91,725; 33,863; 19,195

#### Solution:
We will arrange each set from largest to smallest.

##### Set 11:
- Original: 81,873; 20,146; 32,440; 28,515; 34,305; 30,298
- Descending: 81,873; 34,305; 32,440; 30,298; 28,515; 20,146

##### Set 12:
- Original: 77,142; 77,854; 74,901; 53,136; 13,522; 71,902
- Descending: 77,854; 77,142; 74,901; 71,902; 53,136; 13,522

##### Set 13:
- Original: 71,435; 63,791; 24,488; 64,507; 51,762; 92,574
- Descending: 92,574; 71,435; 64,507; 63,791; 51,762; 24,488

##### Set 14:
- Original: 53,899; 98,212; 36,129; 40,371; 75,072
- Descending: 98,212; 75,072; 53,899; 40,371; 36,129

##### Set 15:
- Original: 54,007; 33,900; 15,195; 29,182; 64,662; 30,702
- Descending: 64,662; 54,007; 33,900; 30,702; 29,182; 15,195

##### Set 16:
- Original: 85,484; 80,978; 11,983; 19,856; 86,222; 68,004
- Descending: 86,222; 85,484; 80,978; 68,004; 19,856; 11,983

##### Set 17:
- Original: 11,284; 95,857; 19,856; 47,276; 91,725; 33,863
- Descending: 95,857; 91,725; 47,276; 33,863; 19,856; 11,284

##### Set 18:
- Original: 70,718; 70,903; 92,877; 91,725; 33,863; 19,195
- Descending: 92,877; 91,725; 70,903; 70,718; 33,863; 19,195

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Final Answer:

1. Section 1:
- 60,670: Sixty thousand six hundred seventy.
- 87,783: Eighty-seven thousand seven hundred eighty-three.
- 52,215: Fifty-two thousand two hundred fifteen.
- 12,240: Twelve thousand two hundred forty.
- 31,861: Thirty-one thousand eight hundred sixty-one.

2. Section 2:
- 66,731
- 98,681
- 95,141
- 54,165
- 92,727

3. Section 3:
- Set 11: 81,873; 34,305; 32,440; 30,298; 28,515; 20,146
- Set 12: 77,854; 77,142; 74,901; 71,902; 53,136; 13,522
- Set 13: 92,574; 71,435; 64,507; 63,791; 51,762; 24,488
- Set 14: 98,212; 75,072; 53,899; 40,371; 36,129
- Set 15: 64,662; 54,007; 33,900; 30,702; 29,182; 15,195
- Set 16: 86,222; 85,484; 80,978; 68,004; 19,856; 11,983
- Set 17: 95,857; 91,725; 47,276; 33,863; 19,856; 11,284
- Set 18: 92,877; 91,725; 70,903; 70,718; 33,863; 19,195

Boxed Final Answer:
\[
\boxed{
\text{See detailed solutions above.}
}
\]