Problem 1

Add the numbers 45 + 26

Solution

Step 1:

We line up the numbers vertically.

Step 2:

We add digits in ones column. 5 + 6 = 11. 1 is written below ones column and other 1 is carried over to the tens column.

Step 3:

In the tens column, 4 + 2 + 1 = 7. 7 is written below tens column and the final sum is 71.

Problem 2

Add the numbers 57 +38

Solution

Step 1:

We line up the numbers vertically.

Step 2:

We add digits in ones column. 7 + 8 = 15. 5 is written below ones column and other 1 is carried over to the tens column.

Step 3:

In the tens column, 5 + 3 + 1 = 9. 9 is written below tens column and the final sum is 95.

Problem 1

Add the numbers 36 + 51

Solution

Step 1:

Line up the numbers vertically.

Step 2:

We first add the digits in ones column. 6 + 1= 7. 7 is written below ones column.

Step 3:

Next we add the digits in tens column. 3 + 5 = 8. 8 is written below tens column. So the sum of numbers is 87.

Problem 2

Find the sum 75 + 14

Solution

Step 1:

We line up the numbers vertically.

Step 2:

We add the digits in ones column. 5 + 4 = 9. 9 is written below the one column.

Step 3:

Next we add the digits in tens column. 7 + 1 = 8. 8 is written below the tens column. The final sum is 89.

Problem 1

Add the single digit numbers.

Solution

Adding three numbers involves two steps

Step 1:

We add the first two numbers; 6 + 3 = 9

Step 2:

Next we add the sum to third number; 9 + 4 = 13

We write down the result

So

Problem 2

Add the numbers

Solution

Step 1:

We add the three numbers by counting forward here. We start counting from the largest number 9 and the count forward 8 to get 17

Step 2:

and from 17, we further count forward 6 to get 23, which is the sum.

So

Problem 1

Add the single digit numbers.

Solution

Method 1

Adding is just like counting in this method.

Step 1:

We pick a number to begin with; lets say, 5.

Step 2:

We count up from the starting number (5) by the number of places as the second number (3) i.e., 6, 7 and 8 and we get the sum as 8.

Method 2

Step 1:

We can also use a number line to find the sum. We start from 5 on the number line and move three places to the right to land on 8. This is the sum.

Step 2:

So

Problem 2

Add the single digit numbers.

Solution

Method 1

Step 1:

We start counting with the greater number 7

Step 2:

And then we count up 4 more to get 11 as the sum.

Method 2

Step 1:

We can also use a number line to add numbers 7 and 4. We start from the greater number 7 on the number line and take 4 jumps to the right to land on the number 11 which is the sum.

Step 2:

So

This tutorial provides comprehensive coverage of addition and subtraction of whole numbers based on Common Core (CCSS) and State Standards and its prerequisites. Students can navigate learning paths based on their level of readiness. Institutional users may customize the scope and sequence to meet curricular needs. This simple tutorial uses appropriate examples to help you understand addition and subtraction of whole numbers in a general and quick way.

Audience

This tutorial has been prepared for beginners to help them understand the basics of Addition and subtraction of whole numbers. After completing this tutorial, you will find yourself at a moderate level of expertise in addition and subtraction of whole numbers, from where you can advance further.

Prerequisites

Before proceeding with this tutorial, you need a basic knowledge of elementary math concepts such Number Sense, Addition, Subtraction, etc.