The DAV Class 4 Maths Book Solutions and DAV Class 4 Maths Chapter 2 Brain Teasers Solutions of Addition and Subtraction offer comprehensive answers to textbook questions.
DAV Class 4 Maths Ch 2 Brain Teasers Solutions
Question 1.
Tick (✓) the correct answer.
(a) When we add 100 to 9,136, the digit at ___________ place increases by 1.
(i) ones
(ii) hundreds
(iii) tens
(iv) thousands
Answer:
(ii) hundreds
(b) The greatest 2-digit number is less than the smallest 3-digit number by ___________
(i) 10
(ii) 9
(iii) 1
(iv) 0
Answer:
(iii) 1
(c) 7,000 – 5,000 – 2,000 ___________.
(i) 0
(ii) 3,000
(iii) 2,000
(iv) 1,000
Answer:
(i) 0
(d) 400 more than the successor of 399 is equal to ___________.
(i) 401
(ii) 499
(iii) 400
(iv) 800
Answer:
(iv) 800
(e) 10 + 101 + 1,001 + 10,001 is equal to
(i) 10,013
(ii) 11,113
(iii) 40,111
(iv) 11,001
Answer:
(ii) 11,113
Question 2.
Solve:
(a) 85,781 + 78,989
Answer:
(b) 48,125 + 9,999
Answer:
(c) 7,56,480 – 51,345
Answer:
(d) 80,000 – 79,899
Arrange in column then solve.
Answer:
Question 3.
Write down the largest number and the smallest number of four digits in which no digit is repeated and also add them.
Answer:
Largest number of 4-digit = 9876
Smallest number of 4-digit = 1023
Addition = 10899
Question 4.
You are given a magic square. Use the numbers form 1 to 9 only once and complete it so that every row and every column add up to 15.
Answer:
Question 5.
A student was asked to write numeral for seventy six thousand and five. He wrote 7,605. Find the difference between the correct answer and his answer.
Answer:
Correct answer = 7 6 0 0 5
Student answer = 7 6 0 5
Difference = 6 8 4 0 0
Question 6.
The difference between two numbers is 98,506 and the greater number is 1,00,009. Find the smaller number.
Answer:
Let the smaller number = x
greater number – smaller no. = Difference
1,00,009 – x = 48,506
-x = 48,506 – 1,00,009
x = 1,00,009 – 48, 506
Smaller number = 51,503
Question 7.
Fill in the blanks.
(a) 4,128 + ___________ = 4,128
Answer:
0
(b) ___________ + 82 + 71 = ___________ + 96 + 82
Answer:
96; 71
(c) If 75 + 169 + 1,001 = 1,245 then 1,00 + 75 + 169 = ___________.
Answer:
1,245
(d) 11,111 + 1,111 + 111 + 11 + 1 = ___________
Answer:
12, 345
(e) ___________ – 0 = 785
Answer:
785
(f) 4,500 – 1,500 = ___________
Answer:
3,000
(g) 18,000 – ___________ = 8,000
Answer:
10,000
(h) 7,500 + 2,500 = ___________
Answer:
10,000
Additional Questions
Question 1.
Solve the following:
(a) 6,000 + 6 + 16 =
Answer:
6,022
(b) 2,007 – 207 = 1,300 + ?
Answer:
500
(c) 21,483 – ? = 16,483
Answer:
5,000
(d) The difference between the 2760 and 5000 is ___________.
Answer:
5,000 – 2,760 = 2,240
(e) 90,000 – 2,786 = ?
Answer:
87,214
Question 2.
Add the numbers:
(i) 27,566 + 30,647
Answer:
Arrange in column.
(ii) 54,410 + 98,862
Answer:
Arrange in column.
(iii) 1,24,732 + 87,540
Answer:
Arrange in column.
Question 3.
Subtract the following:
(i) 53,400 and 37,423
Answer:
(ii) 54,625 and 38,876
Answer:
(iii) Sixty six thousand and six from ninety thousand and twenty six.
Answer:
(iv) 32,040 and 2,630
Answer:
Question 4.
What number should be subtracted from 32,055 to get 8,675?
Answer:
Number should be difference of two number so. 32055 – 8675 = 23,380
Question 5.
A number exceeds 2,48,545 by 17,605. What is that number?
Answer:
We have to add both the number.
New number = 2,66,150
Question 6.
The price of small car is ₹ 5,70,360 & that of van is ₹ 7,50,540. Which costs more and by how much?
Answer:
7 > 5 so van costs more.
Thus, van costs more than the car by ₹ 1,80,180