Expanded form of a Number

We know that the number written as sum of the place-values of its digits is called the expanded form of a number.

In expanded form of a number, the number is shown according to the place values of its digits.

This is shown here:

In 2385, the place values of the digits are given below:

Hence, 2385 = 2000 + 300 + 80 + 5

Thus, 2000 + 300 + 80 + 5 is the expanded form of 2385.

Again, 

Expanded Notation

The digits of the numerals 394381, 163845, 583927 are entered in the place value chart as given below.

(i) What is the expanded form of the number 394381?

394381 = 3 lakhs + 9 ten thousands + 4 thousands + 3 hundreds +

               8 tens + 1 one

            = 3 × 100000 + 9 × 10000 + 4 × 1000 + 3 × 100 + 8 × 10 +

               1 × 1

            = 300000 + 90000 + 4000 + 300 + 80 + 1

(ii) What is the expanded form of the number 163845?

163845 = 1 lakhs + 6 ten thousands + 3 thousands + 8 hundreds +

               4 tens + 5 ones

            = 1 × 100000 + 6 × 10000 + 3 × 1000 + 8 × 100 + 4 × 10 +

            = 5 × 1

            = 100000 + 60000 + 3000 + 800 + 40 + 5

(iii) What is the place value of all the digits of number 583927?

Given the expanded form of a number, we can also write the numeral in the standard form.

500000 + 80000 + 3000 + 900 + 20 + 7

= 583927

Expanded form of a number to standard form.

(iv) 3000 + 200 + 40 + 8 = 3248

(v) 7 ten thousands + 4 thousands + 2 hundreds + 3 tens + 8 ones

   = 74238

Solved Examples on Expanded Form of a Number:

1. Write the expanded form for the number 70,39,41,295.

Solution:

Therefore, the expanded form of the number 70,39,41,295 is 70,00,00,000 + 00000000 + 3000000+ 900000 + 40000 + 1000 + 200 + 90 + 5.

2. Find the expanded form of 453169.

Solution:

Place values of digits 453169

So, 453169 = 400000 + 50000 + 3000 + 100 + 60 + 9

3. Write the number in figures and then in words for the following expanded form:

(i) 80000 + 8000 + 500 + 50 + 7

Solution:

80000 + 8000 + 500 + 50 + 7

= 88557 (in figures)

Eighty eight thousand five hundred fifty seven (in words)

(ii) 100000 + 30000 + 2000 + 10 + 6

Solution:

100000 + 30000 + 2000 + 10 + 6 = 132016 (in figures)

One hundred thirty two thousand sixteen (in words)

We can write the expanded form of numbers in different ways.

4. Write in expanded form:

(i) 28369

Write as:

(a) 20000 + 8000 + 300 + 60 + 9

(b) 2 × 10000 + 8 × 1000 + 3 × 100 + 6 × 10 + 9 × 1

(c) 2 ten thousands + 8 thousands + 3 hundreds + 6 tens + 9 ones

(ii) 419,247

Write as:

(a) 400000 + 10000 + 9000 + 200 + 40 + 7

(b) 4 × 100000 + 1 × 10000 + 9 × 1000 + 2 × 100 + 4 × 10 + 7 × 1

(c) 4 hundred thousands + 1 ten thousands + 9 thousands + 2 hundreds + 4 tens + 7 ones

Numbers Beyond One Lakh

Note: There are 7 digits in ten lakhs.

         Therefore the seventh place is called ten lakhs place.

Questions and Answers on Expanded Form of a Number:

I. Write the given numbers in expanded form:

(i) 617 = _____ + _____ + _____

(ii) 319 = _____ + _____ + _____

(iii) 286 = _____ + _____ + _____

(iv) 939 = _____ + _____ + _____

(v) 677 = _____ + _____ + _____

(vi) 918 = _____ + _____ + _____

(vii) 328 = _____ + _____ + _____

(viii) 520 = _____ + _____ + _____

(ix) 647 = _____ + _____ + _____

(x) 474 = _____ + _____ + _____

Answer:

I. (i) 600 + 10 + 7

(ii) 300 + 10 + 9

(iii) 200 + 80 + 6

(iv) 900 + 30 + 9

(v) 600 + 70 + 7

(vi) 900 + 10 + 8

(vii) 300 + 20 + 8

(viii) 500 + 20 + 0

(ix) 600 + 40 + 7

(x) 400 + 70 + 4

II. Write the expanded form for the given numbers:

(i) 7,12,306

(ii) 8,07,392

(iii) 6,44,895

(iv) 3,73,737

(v) 9,22,005

Answers:

II. (i) 7,00,000 + 10,000 + 2,000 + 300 + 0 + 6

(ii) 8,00,000 + 0 + 7,000 + 300 + 90 + 2

(iii) 6,00,000 + 40,000 + 4,000 + 800 + 90 + 5

(iv) 3,00,000 + 70,000 + 3,000 + 700 + 30 + 7

(v) 9,00,000 + 20,000 + 2,000 + 0 + 0 + 5

III. Write the given number in standard form:

(i) 30,000 + 4,000 + 700 + 2

(ii) 2,00,000 + 80,000 + 4,000 + 800 + 50

(iii) 6,00,000 + 40,000 + 4,000 + 800 + 90 + 5

(iv) 8,00,000 + 10,000 + 6,000 + 200 + 50 + 7

(v) 1,00,000 + 20,000 + 1,000 + 200 + 10 + 2

(vi) 9,00,000 + 2

Answers:

III. (i) 34702

(ii) 2,84,850

(iii) 6,44,895

(iv) 8,16,257

(v) 1,21,212

(vi) 9,00,002

IV. Rearrange and write the number:

Answer:

V. Circle the correct one

Answer:

(i) 923

(ii) 601

(iii) 363

(iv) 221

(v) 584

(vi) 980

VI. Write the following numbers in the expanded form in three different ways as shown in the examples.

(i) 61,052

61,052 -   6 ten thousands + 1 thousand + 0 hundreds + 5 tens + 2 ones

                 -   6 × 10000 + 1 × 1000 + 0 × 100 + 5 × 10 + 2× 1

                 -   60000 + 1000 + 0 + 50 + 2

(ii) 1, 99, 099

(iii) 2,80,476

(iv) 3,67,814

(v) 8,31, 879

Related Concept 

• Formation of Numbers.
• Finding Out the Numbers
• Names of the Numbers.
  
• Numbers Showing on Spike Abacus.
  
• 1 Digit Number on Spike Abacus.
  
• 2 Digits Number on Spike Abacus.
  
• 3 Digits Number on Spike Abacus.
  
• 4 Digits Number on Spike Abacus.
  
• 5 Digits Number on Spike Abacus.
  
• Large Number.
• Place Value Chart.
• Place Value.
• Problems Related to Place Value.
• Expanded form of a Number.
• Standard Form.
• Comparison of Numbers.
• Example on Comparison of Numbers.
• Successor and Predecessor of a Whole Number.
  
• Arranging Numbers.
  
• Formation of Numbers with the Given Digits.
• Formation of Greatest and Smallest Numbers.
• Examples on the Formation of Greatest and the Smallest Number.
• Rounding off Numbers.

4th Grade Math Activities

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