Given numbers are 0 and 5 , Adding zero to any number gives the number itself. Now count them altogether. Therefore, the required sum is 5 .

Given: Here we need to add the numbers vertically. Thus, after 1 count 5 . Therefore, the sum of given numbers by adding vertically is 6 .

Three boys come to the front of the class. Two girls join the group. Now how many are they ?

It is given to find total number of girls and boys. Number of boys in front of class is 3 . Number of girls who joined the boys is 2 Thus, total number of boys and girls are 3 + 2 = 5 . Therefore, there are 5 boys and girls together.

Given: Here we need to add the numbers vertically. Thus, after 3 count 6 . Therefore, the sum of given numbers by adding vertically is 9 .

Given: Here we need to add the number vertically. Thus, after 6 count 2 . Therefore, the sum of given numbers by adding vertically is 8 .

We need to find the value of 3 + 6 . We add the numbers by counting dots. We use 3 dots to show the number 3 . We use 6 dots to show the number 6 . To find 3 + 6 , we count the total number of dots in the last row. 3 ∙ ∙ ∙ + 6 ∙ ∙ ∙ ∙ ∙ ∙ 9 ∙ ∙ ∙ ∙ ∙ ∙ ∙ ∙ ∙ Total number of dots is 9 , hence 3 + 6 = 9 .

Given: Here we need to add the numbers vertically. Thus, after 8 count 1 . Therefore, the sum of given numbers by adding vertically is 9 .

Add the numbers: T O 9 + 4

Given: T O 9 + 4 Two numbers are given to add. Add 9 and 4 . T O Carry 1 9 + 4 1 3 Hence, the sum is 13 .

Three girls come to the front of the class. Two boys join the group. Now how many are they ? Three boys come to the front of the class. Two girls join the group. Now how many are they ? Are both groups equal ? What does this show ?

It is given to find total number of girls and boys. 1. Number of girls in front of class is 3 . Number of boys who joined the girls is 2 Thus, total number of boys and girls are 3 + 2 = 5 . 2. Number of boys in front of class is 3 . Number of girls who joined the boys is 2 . Thus, total number of boys and girls are 3 + 2 = 5 . Yes, both groups are equal in number. It shows that, when 3 and 2 are added either way the sum will remain the same. Hence, any two numbers added either way the sum will remain the same.

Add vertically: 4 + 0

Given: 4 + 0 Here we need to add the numbers vertically. We know that, Any number added to zero, the sum is the number itself. Thus, 4 + 0 = 4 Therefore, the sum is 4 .