Olympiad Test: Addition - 1 - Class 4 MCQ

• Sum is always greater than the numbers being added: This is a fundamental property of addition in mathematics. When we add two or more numbers together, the result will always be greater than any of the individual numbers being added. This is because we are combining the quantities to get a larger total.


• Except if the numbers being added is zero: If we are adding zero to any number, the sum will be equal to that number itself. This is because zero is the additive identity in mathematics, meaning that adding zero to any number does not change the value of that number.

• Therefore, the sum is always greater than the numbers being added, except when the numbers being added are zero.

If  we change the order of the numbers being added the sum does not change.
(Property of addition)
i.e., a + b = b + a

• Addition of 0 and 33: When you add 0 and 33 together, you get 33.


• Therefore, the correct answer is 33 (Option B).

If we add zero to any number, the sum remains the same (Property of addition)

• Addition of any number with zero:
  
  
  
  • 0 + 0 = 0+1 = 1
  
  
  • 1 + 0 = 1+1 = 2
  
  
  • 2 + 0 = 2+1 = 3
  
  
  • 3 + 0 = 3+1 = 4
  
  
  • ...
  
  
  
  


• Explanation:
  
  
  
  • When we add zero to any number, the sum is always the successor of that number. This is because zero acts as the identity element for addition.
  
  
  • For example, when we add 0 to 1, we get 1+0 = 1, which is the successor of 1.
  
  
  • Therefore, the correct answer is one (B).
  
  
  
  

• Given Equation: 25 + 1


• When you add 25 and 1 together, you get 26.


• Therefore, 25 + 1 = 26

We know addend + addend = sum

• Addition: To find the sum of 43 + 32, we need to add the two numbers together.


• Step 1: Add the units place: 3 + 2 = 5.


• Step 2: Add the tens place: 4 + 3 = 7.


• Step 3: Combine the results from Step 1 and Step 2 to get the final sum: 75.

Sum, Plus and Increase will be the increment of the number,

but the difference will decrease the number.

On adding two numbers the result obtained is called sum.

• Addend: The numbers to be added in an addition problem are known as addends. These are the values that are combined to find the total sum.

• 25 + ------ = 26


• Let's solve for the blank space.


• Subtract 25 from both sides of the equation:


• ------ = 26 - 25


• ------ = 1


• Therefore, the missing number is 1.

• Given: 1 + 0


• Calculation: Adding 1 and 0


• Result: 1 + 0 = 1

• When we add 1 and 0, the result is 1.


• Even though 0 is considered as the additive identity, adding it to any number does not change the value of that number.


• Therefore, the sum of 1 and 0 is 1.

1) 171 → 1 + 7 + 1 = 9

2) 181 → 1 + 8 + 1 = 10

3) 161 → 1 + 6 + 1 = 8

4) 131 → 1 + 3 + 1 = 5

We are getting all nonprime number except ‘5’

Hence, ‘131’ is the odd one out.

• A: 5 + 5 = 10


• B: 8 + 2 = 10


• C: 6 + 4 = 10


• D: 5 + 4 = 9

• All the options involve adding two numbers to get a sum.


• Options A, B, and C result in a sum of 10, while option D results in a sum of 9.


• Therefore, the odd one out is option D (5 + 4 = 9) as it does not result in a sum of 10 like the other options.

• The odd one out is option D (5 + 4) as it does not result in a sum of 10 like the other options (A, B, C).

• Addend, Sum, Total: These terms are related to addition in mathematics. An addend is a number that is added to another number, the sum is the result of adding two or more numbers together, and total is the overall amount or sum of numbers.


• Difference: This term is related to subtraction in mathematics. The difference is the result of subtracting one number from another.

• When we add numbers, we get a sum or a total, but when we subtract numbers, we get a difference.


• In this list, "Difference" is the odd one out as it is related to subtraction, while the other terms are related to addition.


• Therefore, the odd one out in this list is Difference.

• Given equation: 516 + x = 516


• Subtract 516 from both sides: x = 0

• When we have an equation in the form of a + b = c, we can find the value of b by subtracting a from c.


• In this case, we have 516 + x = 516. To find the value of x, we need to subtract 516 from both sides of the equation.


• By doing so, we get x = 0, which means the value of x that satisfies the equation is 0.

• Given: 1005 + x = 1006


• Find x:


• Subtract 1005 from both sides to isolate x:


• 1005 + x - 1005 = 1006 - 1005


• x = 1

• Start with the equation 1005 + x = 1006


• Subtract 1005 from both sides to get x by itself on one side of the equation


• When you subtract 1005 from 1005 + x, the 1005 on the left side cancels out, leaving you with x


• On the right side, 1006 - 1005 equals 1


• Therefore, x = 1

• Given Problem: 5674 + 6 = 5680


• Addends: The numbers being added together in an addition problem are called addends. In this case, the addends are 5674 and 6.


• Sum: The result of adding two or more numbers is called the sum. In this case, the sum of 5674 and 6 is 5680.

• The addends in this problem are 5674 and 6. These are the numbers that are being added together.


• When we add 5674 and 6, we get a sum of 5680.


• Therefore, in the addition problem 5674 + 6 = 5680, the addends are 5674 and 6, and the sum is 5680.

• Addition: When we add 999 and 1, we get 1000.


• Carrying over: When adding numbers in the tens column, we carry over the extra digit to the hundreds column. In this case, when adding 9 and 1 in the tens column, we carry over the extra digit to the hundreds column, resulting in 10.


• Final result: So, the final result of 999 + 1 is 1000.