NCERT Class 4 Mathematics Maths Mela Chapter 04 Thousands Around Us PDF Download

Chapter 4: Thousands Around Us

Jaspreet and Gulnaz are organising a langar (a community lunch) in their neighbourhood Gurudwara. They expect around one thousand (1000) people to be fed on that day. Fifty-five people volunteer to serve during this event. Jaspreet and Gulnaz receive many donations.

The donations are shown in the table below. Write the number in each case.

Jaspreet and Gulnaz record the number of people who come for the community lunch at different times.

Write the time and draw the number of people who had food at different time slots using HTO blocks as shown below.

The time slot when the most number of people came for lunch is _____________________.

The time slot when the least number of people came for lunch is _____________________.

Let Us Do

1. (a) Make 3-digit numbers using the digits 3 and 7. Write the numbers in the boxes given below. Circle the smallest and cross out the largest.

   333

2. (b) Make six 3-digit numbers using the digits 3, 5, 0, 8 such that all numbers are less than 550. You can repeat the digits.
3. (c) Mark the numbers you made in 1(b) on the number line.

   [Picture: Number line from 200 to 600, marked at intervals of 50]

2. Fill in the blanks with appropriate numbers.

   a)

   [Picture: A caterpillar-like sequence with circles containing 787, 788, and more circles to fill]

   b)

   [Picture: A train with cars labeled 933, 934, and more cars to fill]

   c)

   [Picture: Pumpkins on a vine with 679 and 689 marked, spaces to fill between]

   d)

   [Picture: Cars in a row with 338, 348 marked, spaces to fill]

   e)

   [Picture: Fish in water with 367 and 567 marked, spaces to fill]

Teacher's Note

When you fill in a sequence, first work out what changes from one number to the next. For example, in 787, 788, the numbers go up by 1 each time. In 338, 348, they go up by 10. Look at two given numbers and find the pattern, then use it to fill the blanks.

As we have learnt in Grade 3, the Indian system of writing numbers, which we have been learning and practising in school to write and add and subtract numbers, was discovered in India around 2000 years ago, and is now used around the world. This system was designed so that we can write all numbers, no matter how large they are, using just the ten symbols 0, 1, 2, 3, 4, 5, 6, 7, 8, and 9.

Till now, we have learnt how to write all numbers from 1 to 999. Now let us explore how to write numbers one thousand and larger in the Indian number system!

You remember that Gulnaz and Jaspreet had kept track of the people who came for the community lunch.

Let us see how they did it.

[Picture: Two number charts showing 1-1000 and 1001-1100, with annotations for 1001 person, 1002, and 1000th person]

How many people came for the community lunch? __________

Fill in the blanks with appropriate numbers.

[Picture: A chart showing numbers arranged in groups, with empty boxes and labels for "1000th person", "1001", and "1002"]

Teacher's Note

The number 1000 is written as one thousand. After 999 comes 1000. Notice that 1000 has four digits: a 1 in the thousands place, and 0 in the hundreds, tens, and ones places. When you read or write 1001, 1002, and larger numbers, the pattern of place value still works the same way.

Key Points

• Numbers can be represented in different ways: as physical blocks, as digit addition, or as word names. The quantity stays the same no matter which way you show it.
• To fill a number sequence, find the pattern by looking at two given numbers, then add or subtract the same amount for each blank.
• The Indian number system uses the digits 0 through 9 to write all numbers, no matter how large. After 999 comes 1000, which is called one thousand.
• The place value system works the same for four-digit numbers as for three-digit numbers: each place is worth ten times the place to its right.

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