Addition:

Adding 1 or 2 digits involves combining numbers where one number has 1 digit and the other has up to 2 digits. This process involves correctly aligning the place values (ones and tens) and carrying over if the sum in any place exceeds.

Example 1:

Add 43 and 7.

Solution:

• Write the numbers in column form: 43 + 7
• Add the ones in place: 3+7=10 (write 0; carry over 1 to the tens place)
• Add the tens place: 4+1=5

Final Solution: 43+7=50.

Example 2:

Add 56 and 12.

Solution:

• Write the numbers in column form: 56 + 12
• Dd the one's place: 6+2=8
• Add the tens place: 5+1=6

Final Solution: 56+12=68

Example 3:

Add 8 and 27.

Solution:

• Write the numbers in column form: 8 + 27
• Add the ones in place: 8+7=15 (write 5, carry over 1 to the tens place)
• Add the tens place: 2+1=3
• Final Solution: 8+27=35

Example 5:

A school raised $43,258 during a fundraiser in January and $21,634 in February. In total, how much money did the school raise?

Solution:

• Identify the numbers to add:
  • January: $43,258
  • February: $21,634
• Add the numbers: 43,258+21,634=64,892

Final solution: The school raised a total of $64,892.

Why it matters:

Adding 2-digit numbers is a fundamental math skill that helps solve everyday problems, from calculating expenses to measuring quantities. It builds a strong foundation for advanced arithmetic concepts like multiplication and division. Mastering addition improves problem-solving, logical thinking, and 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 adding 2-digits.