Printable Textbook: Numbers - Level 4 | Mental Maths - Class 1 PDF Download

 Page 1


10
M E
N
T
A
L
M
A
T H
S
 
Numbers
(Refer to the chapter # 1 of the NCERT Maths Book of Class IV)
Summary
• Indian Place Value System:
Place Value Chart
Periods Lakhs Thousands Ones
Places Ten Lakhs Lakhs Ten 
Thousands
Thousands Hundreds Tens Ones
Place 
Values
10,00,000 1,00,000 10,000 1000 100 10 1
• Face V alue of a digit in a number is the digit itself, regardless of the place 
it occupies in the place value chart.
For example: The face value of 5 in 25689 is 5.
• Place V alue of a digit in a number depends on the place it occupies in the 
Place V alue Chart. Place value of a digit in a number is equal to face value 
mutiplied by the value of the place it occupies in the place value chart.
For example:
The place value of 5 in 25689 is 5000
i.e. 5 × 1000 = 5000
Page 2


10
M E
N
T
A
L
M
A
T H
S
 
Numbers
(Refer to the chapter # 1 of the NCERT Maths Book of Class IV)
Summary
• Indian Place Value System:
Place Value Chart
Periods Lakhs Thousands Ones
Places Ten Lakhs Lakhs Ten 
Thousands
Thousands Hundreds Tens Ones
Place 
Values
10,00,000 1,00,000 10,000 1000 100 10 1
• Face V alue of a digit in a number is the digit itself, regardless of the place 
it occupies in the place value chart.
For example: The face value of 5 in 25689 is 5.
• Place V alue of a digit in a number depends on the place it occupies in the 
Place V alue Chart. Place value of a digit in a number is equal to face value 
mutiplied by the value of the place it occupies in the place value chart.
For example:
The place value of 5 in 25689 is 5000
i.e. 5 × 1000 = 5000
M E
N
T
A
L
M
A
T H
S
11
• Predecessor =Number-1
For example:
Predecessor of 42 is 41-1 = 41
• Successor = Number+1
For example:
Successor of 42 is 42+1=43
• Ascending Order means arranging numbers from the smallest to the 
greatest.
• Descending Order means arranging numbers from the greatest to the 
smallest.
• An Even  Number is a number that is completely divisible by 2.
Tutty speaks
If the number at ones place is 0, 2, 4, 6, 8,  
then that number is an even number.
For example:
78,  46,  240,  508,  934
• An Odd Number is a number that is not comletely divisible by 2.
Tutty speaks
 If the number at ones place is 1, 3, 5, 7, 9,  
then that number is an odd number.
For example:
81,  95,  407,  653,  549
Page 3


10
M E
N
T
A
L
M
A
T H
S
 
Numbers
(Refer to the chapter # 1 of the NCERT Maths Book of Class IV)
Summary
• Indian Place Value System:
Place Value Chart
Periods Lakhs Thousands Ones
Places Ten Lakhs Lakhs Ten 
Thousands
Thousands Hundreds Tens Ones
Place 
Values
10,00,000 1,00,000 10,000 1000 100 10 1
• Face V alue of a digit in a number is the digit itself, regardless of the place 
it occupies in the place value chart.
For example: The face value of 5 in 25689 is 5.
• Place V alue of a digit in a number depends on the place it occupies in the 
Place V alue Chart. Place value of a digit in a number is equal to face value 
mutiplied by the value of the place it occupies in the place value chart.
For example:
The place value of 5 in 25689 is 5000
i.e. 5 × 1000 = 5000
M E
N
T
A
L
M
A
T H
S
11
• Predecessor =Number-1
For example:
Predecessor of 42 is 41-1 = 41
• Successor = Number+1
For example:
Successor of 42 is 42+1=43
• Ascending Order means arranging numbers from the smallest to the 
greatest.
• Descending Order means arranging numbers from the greatest to the 
smallest.
• An Even  Number is a number that is completely divisible by 2.
Tutty speaks
If the number at ones place is 0, 2, 4, 6, 8,  
then that number is an even number.
For example:
78,  46,  240,  508,  934
• An Odd Number is a number that is not comletely divisible by 2.
Tutty speaks
 If the number at ones place is 1, 3, 5, 7, 9,  
then that number is an odd number.
For example:
81,  95,  407,  653,  549
12
M E
N
T
A
L
M
A
T H
S
Questions
1. Find the sum of 3000 and its predecessor.
2. Fill in the blanks:
(i) The successor of 8999 is ..............
(ii) 3 thousand + 4 hundred + 3 tens + 9 ones = ..............
(iii) One more than 4679 is ..............
(iv) The place value of 5 in 75,670 is ..............
(v) The sum of place values of 2 in 7426 and 2459 is ..............
3. How many hundreds make three thousand?
4. Find out the difference between the place value and the face value of 7 in 
8672.
5. 100 tens = ..............
(a) 1 thousand (b) 10 thousand (c) 100 thousand (d) 1 ten thousand
6. Choose the smallest 5 digit number.
(a) 40759 (b) 24179 (c) 47262 (d) 21749
7. The largest 5-digit number having 0 at thousand’s place is ..............
(a) 85402 (b) 80524 (c) 80502 (d) 84250
8. 8 thousands 9 hundreds is same as ..............
(a) 8090 (b) 8009 (c) 8900 (d) 9800
9. Fill in the blanks using Roman Numbers
(i) VI –  = II
(ii) V –  = X
(iii) VIII –  = IV
(iv) IX –  = V
(v) VII+II  =  
10. What is the sum of four consecutive numbers followed by 10?
11. Find out the difference of the largest 2-digit even number and the smallest 
2- digit odd number.
Page 4


10
M E
N
T
A
L
M
A
T H
S
 
Numbers
(Refer to the chapter # 1 of the NCERT Maths Book of Class IV)
Summary
• Indian Place Value System:
Place Value Chart
Periods Lakhs Thousands Ones
Places Ten Lakhs Lakhs Ten 
Thousands
Thousands Hundreds Tens Ones
Place 
Values
10,00,000 1,00,000 10,000 1000 100 10 1
• Face V alue of a digit in a number is the digit itself, regardless of the place 
it occupies in the place value chart.
For example: The face value of 5 in 25689 is 5.
• Place V alue of a digit in a number depends on the place it occupies in the 
Place V alue Chart. Place value of a digit in a number is equal to face value 
mutiplied by the value of the place it occupies in the place value chart.
For example:
The place value of 5 in 25689 is 5000
i.e. 5 × 1000 = 5000
M E
N
T
A
L
M
A
T H
S
11
• Predecessor =Number-1
For example:
Predecessor of 42 is 41-1 = 41
• Successor = Number+1
For example:
Successor of 42 is 42+1=43
• Ascending Order means arranging numbers from the smallest to the 
greatest.
• Descending Order means arranging numbers from the greatest to the 
smallest.
• An Even  Number is a number that is completely divisible by 2.
Tutty speaks
If the number at ones place is 0, 2, 4, 6, 8,  
then that number is an even number.
For example:
78,  46,  240,  508,  934
• An Odd Number is a number that is not comletely divisible by 2.
Tutty speaks
 If the number at ones place is 1, 3, 5, 7, 9,  
then that number is an odd number.
For example:
81,  95,  407,  653,  549
12
M E
N
T
A
L
M
A
T H
S
Questions
1. Find the sum of 3000 and its predecessor.
2. Fill in the blanks:
(i) The successor of 8999 is ..............
(ii) 3 thousand + 4 hundred + 3 tens + 9 ones = ..............
(iii) One more than 4679 is ..............
(iv) The place value of 5 in 75,670 is ..............
(v) The sum of place values of 2 in 7426 and 2459 is ..............
3. How many hundreds make three thousand?
4. Find out the difference between the place value and the face value of 7 in 
8672.
5. 100 tens = ..............
(a) 1 thousand (b) 10 thousand (c) 100 thousand (d) 1 ten thousand
6. Choose the smallest 5 digit number.
(a) 40759 (b) 24179 (c) 47262 (d) 21749
7. The largest 5-digit number having 0 at thousand’s place is ..............
(a) 85402 (b) 80524 (c) 80502 (d) 84250
8. 8 thousands 9 hundreds is same as ..............
(a) 8090 (b) 8009 (c) 8900 (d) 9800
9. Fill in the blanks using Roman Numbers
(i) VI –  = II
(ii) V –  = X
(iii) VIII –  = IV
(iv) IX –  = V
(v) VII+II  =  
10. What is the sum of four consecutive numbers followed by 10?
11. Find out the difference of the largest 2-digit even number and the smallest 
2- digit odd number.
M E
N
T
A
L
M
A
T H
S
13
12. Name the period of the underlined digit in 7 649.
13. Which number is eight less than Eight thousand four hundred?
14. Choose the number which has the greater place value for 8.
 (a) 43,805 (b) 38,470
 (c) 54,085 (d) 34,078
15. 7 thousands + 90 tens + 8 ones = 
 (a)   7098 (b)   7908
 (c)   7980 (d)   7890
16. The smallest 4-digit number formed by using the digits 0, 4, 8, 5 is ..............
17. A number is greater than 3 but less than 8. Also the number is greater than 
6 but less than 10. What is the number?
18. How many digits do we get in the answer when we add 99 and 1?
19. If the following numbers are arranged in the ascending order, which 
number would come at the second position?
 24,467 24,674 26,744 24,647
20. Which of the following sets are odd numbers?
(a) 2, 3, 7, 9, 11
(b) 1, 3, 5, 7, 9
(c) 1, 2, 5, 7, 9
(d) 3, 6, 8, 11, 13
21. I am greater than 20 and less than 26. I am an even number and you can 
get me when you place the same number at the places of ones and tens. 
Who am I?
22. A number has 9 at the tens place. 4 at the hundreds place and 7 at the 
thousands place. The number is ..............
(a) 749
Page 5


10
M E
N
T
A
L
M
A
T H
S
 
Numbers
(Refer to the chapter # 1 of the NCERT Maths Book of Class IV)
Summary
• Indian Place Value System:
Place Value Chart
Periods Lakhs Thousands Ones
Places Ten Lakhs Lakhs Ten 
Thousands
Thousands Hundreds Tens Ones
Place 
Values
10,00,000 1,00,000 10,000 1000 100 10 1
• Face V alue of a digit in a number is the digit itself, regardless of the place 
it occupies in the place value chart.
For example: The face value of 5 in 25689 is 5.
• Place V alue of a digit in a number depends on the place it occupies in the 
Place V alue Chart. Place value of a digit in a number is equal to face value 
mutiplied by the value of the place it occupies in the place value chart.
For example:
The place value of 5 in 25689 is 5000
i.e. 5 × 1000 = 5000
M E
N
T
A
L
M
A
T H
S
11
• Predecessor =Number-1
For example:
Predecessor of 42 is 41-1 = 41
• Successor = Number+1
For example:
Successor of 42 is 42+1=43
• Ascending Order means arranging numbers from the smallest to the 
greatest.
• Descending Order means arranging numbers from the greatest to the 
smallest.
• An Even  Number is a number that is completely divisible by 2.
Tutty speaks
If the number at ones place is 0, 2, 4, 6, 8,  
then that number is an even number.
For example:
78,  46,  240,  508,  934
• An Odd Number is a number that is not comletely divisible by 2.
Tutty speaks
 If the number at ones place is 1, 3, 5, 7, 9,  
then that number is an odd number.
For example:
81,  95,  407,  653,  549
12
M E
N
T
A
L
M
A
T H
S
Questions
1. Find the sum of 3000 and its predecessor.
2. Fill in the blanks:
(i) The successor of 8999 is ..............
(ii) 3 thousand + 4 hundred + 3 tens + 9 ones = ..............
(iii) One more than 4679 is ..............
(iv) The place value of 5 in 75,670 is ..............
(v) The sum of place values of 2 in 7426 and 2459 is ..............
3. How many hundreds make three thousand?
4. Find out the difference between the place value and the face value of 7 in 
8672.
5. 100 tens = ..............
(a) 1 thousand (b) 10 thousand (c) 100 thousand (d) 1 ten thousand
6. Choose the smallest 5 digit number.
(a) 40759 (b) 24179 (c) 47262 (d) 21749
7. The largest 5-digit number having 0 at thousand’s place is ..............
(a) 85402 (b) 80524 (c) 80502 (d) 84250
8. 8 thousands 9 hundreds is same as ..............
(a) 8090 (b) 8009 (c) 8900 (d) 9800
9. Fill in the blanks using Roman Numbers
(i) VI –  = II
(ii) V –  = X
(iii) VIII –  = IV
(iv) IX –  = V
(v) VII+II  =  
10. What is the sum of four consecutive numbers followed by 10?
11. Find out the difference of the largest 2-digit even number and the smallest 
2- digit odd number.
M E
N
T
A
L
M
A
T H
S
13
12. Name the period of the underlined digit in 7 649.
13. Which number is eight less than Eight thousand four hundred?
14. Choose the number which has the greater place value for 8.
 (a) 43,805 (b) 38,470
 (c) 54,085 (d) 34,078
15. 7 thousands + 90 tens + 8 ones = 
 (a)   7098 (b)   7908
 (c)   7980 (d)   7890
16. The smallest 4-digit number formed by using the digits 0, 4, 8, 5 is ..............
17. A number is greater than 3 but less than 8. Also the number is greater than 
6 but less than 10. What is the number?
18. How many digits do we get in the answer when we add 99 and 1?
19. If the following numbers are arranged in the ascending order, which 
number would come at the second position?
 24,467 24,674 26,744 24,647
20. Which of the following sets are odd numbers?
(a) 2, 3, 7, 9, 11
(b) 1, 3, 5, 7, 9
(c) 1, 2, 5, 7, 9
(d) 3, 6, 8, 11, 13
21. I am greater than 20 and less than 26. I am an even number and you can 
get me when you place the same number at the places of ones and tens. 
Who am I?
22. A number has 9 at the tens place. 4 at the hundreds place and 7 at the 
thousands place. The number is ..............
(a) 749
14
M E
N
T
A
L
M
A
T H
S
(b) 947
(c) 7490
(d) 9470
 Make 3 digits numbers using all the cards in each question:
23. 
24.
25. 
Answer Key
1. 5999 
2. (i) 9000 (ii) 3439 (iii) 4680 (iv) 5 thousand or 5000 (v) 2020
3. 10 hundreds
4. 63
5. (a)
6. (d)
7. (b)
8. (c)
9. (i) IV (ii) V (iii) IV (iv) IV (v) IX
10. 50
11. 87
12. ones
13. 8392
14. (b)
15. (b)
16. 4058
03 7
the smallest number
3
8
8
2
5
4
an even number
7 tens less than 498