Definition:

Two-digit addition is a simple form of addition in which numbers are placed according to their place value of ones and tens and then added. We start adding from right to left, starting from the ones column and moving on to the tens column. To find the total, adding 2-digit numbers with three addends involves summing three numbers, each consisting of two digits.

How can we add numbers with three addends?

Add  11, 23, and 12.

Add the first two numbers: 11+23=34

Add the result to the third number: 34 + 12 = 46.

Answer: 11+23+12=46

This process strengthens arithmetic skills and helps students understand combining multiple values.

Example 1:

Add 23+45+32.

Solution:

• Add the first two numbers: 23+45=68
• Add the result to the third number: 68+32=100

Answer: 23+45+32=100

Example 2:

Add 51+42+36.

Solution:

• Add the first two numbers: 51+42=93
• Add the result to the third number: 93+36=129

Answer: 51+42+36=129

Learning to add 2-digit numbers with three addends helps students strengthen their problem-solving and arithmetic skills. It builds a foundation for tackling more complex calculations and real-world problems, such as budgeting or combining measurements. This skill fosters logical thinking and improves mental math abilities.

By practicing addition with 2-digit numbers, you can solve real-world problems quickly! Let’s practice and evaluate your work together by missing numbers.