Add two two-digit numbers - with regrouping

Learning Objectives Identify when regrouping is needed in addition. Add the numbers in the ones place first. Regroup 10 ones as 1 ten. By the end of a lesson, students will be able to carry the new ten to the tens place column. Add all the digits in the tens place column. Solve two-digit addition problems with regrouping. You have 35 shiny stickers ✨ and your friend gives you 17 more. How many do you have now? 🤔 We will learn a cool trick called regrouping! It helps us add bigger numbers together. This makes you a math superstar! 🌟 Real-World Applications Counting all your toys 🧸 Adding up scores in a game 🎲 Figuring out how much money you have 💰 Sharing snacks with friends 🍪

TermDefinitionExample DigitA single number. The numbers 0, 1, 2, 3, 4, 5, 6, 7, 8, 9 are all digits.In the number 28, the digits are 2 and 8. Ones PlaceThe place for the smallest numbers. It's always on the far right. ➡️In the number 45, the 5 is in the ones place. Tens PlaceThe place for groups of ten. It's to the left of the ones place. ⬅️In the number 45, the 4 is in the tens place. It means 4 tens. Place ValueWhere a digit is in a number tells you how much it is worth.In 62, the 6 is worth 60 and the 2 is worth 2. Regrouping (or Carrying)When you have 10 or more in the ones place, you make a new group of ten.If you have 14 ones, you regroup it as 1 ten and 4 ones. 📦

Stack and Add \frac{+\begin{array}{c} T \ O \ 2 \ 8 \ 1 \ 5 \end{array}}{\begin{array}{c} \ \ \ \ \ \end{array}} Always line up your numbers. Ones go under ones. Tens go under tens. The Regrouping Rule If \ O_1 + O_2 \ge 10, then \text{carry the ten!} If the ones add up to 10 or more, you must regroup. The new ten moves to the top of the tens place.