Addition with regrouping | Addition and subtraction within 100 | Early Math | Khan Academy

TL;DR

Learn how to add two numbers (35 + 27) by regrouping the tens and ones place.

Transcript

• [Voiceover] So I have two numbers here. The top number I have one, two, three 10's, and I have one, two, three, four, five ones. Three 10's five ones or 35. The second number here I have two 10's, one, two, and I have one, two, three, four, five, six, seven one's. Two tens and seven ones. Now what I want to do is I want to add all of these number... Read More

Key Insights

• 🎮 The video demonstrates a step-by-step process of adding two numbers using regrouping.
• 🍹 Regrouping is a method used to simplify addition when the sum exceeds ten in any place value.
• 🤑 By regrouping, the video shows how to represent the sum of tens and ones correctly.
• 🤩 Understanding place value is key in successfully completing addition problems with regrouping.
• 👂 The video emphasizes the importance of carrying over the extra ten into the tens place.
• 🇦🇪 Regrouping simplifies addition by allowing the combination of larger units instead of multiple smaller units.
• 🌥️ The concept of regrouping can be applied to addition problems with larger numbers as well.

Questions & Answers

Q: What are the two numbers being added together in this video?

The two numbers being added together are 35 and 27.

Q: How does regrouping help in adding these two numbers?

Regrouping helps in adding these two numbers by converting ten ones into one ten, making the addition simpler.

Q: What is the final result of adding 35 and 27?

The final result of adding 35 and 27 is 62, which is represented by six tens and two ones.

Q: Why do we need to regroup when adding these numbers?

Regrouping is necessary because the sum of the ones place exceeds ten, so ten ones need to be converted into one ten to maintain the proper place value.

Summary & Key Takeaways

• The video explains how to add the numbers 35 and 27 together using regrouping.

• By starting with the ones place, the video demonstrates how to combine the five ones and seven ones to get twelve ones.

• To simplify the problem, the video regroups ten ones into one ten, resulting in six tens and two ones.