K-5 friendly lesson

Try one idea, then jump into the activity.These lessons are designed to feel short, friendly, and easy to follow.

Subtract 2-Digit Numbers to 100 (With Regrouping)

🚨 Speed round! You know how to borrow. Now prove that you can do it over and over without any mistakes!

Lesson 4

Concept

You possess all the strategies for "borrowing" (regrouping). 🎯 **The Regrouping Checklist:** 1. **Sign Check:** Is it a Minus (-)? Okay, we are taking away. 2. **Floor Check:** Are there more on the floor? (Is the bottom number in the Ones column bigger?). * YES: Go next door. Cross out the Ten. Make it smaller. Give the 10 to the One. * NO: Stop! Do NOT go next door. Just subtract normally. 3. **Subtract Ones.** 4. **Subtract Tens.** (Make sure you use the new, smaller Ten!).

Try it

Lightning Round: Borrowing Edition! **Instructions:** Check the Floor. Borrow. Solve. **Round 1:** 5 3 - 2 8 -------- * Answer: ___ **Round 2:** 8 1 - 4 6 -------- * Answer: ___ **Round 3:** 7 0 - 1 4 -------- * (Hint: 0 is on top. 4 is bigger. Go next door to the 7!) * Answer: ___ **Round 4 (The Trap!):** 6 5 - 3 2 -------- * (Look at the Ones! 5 is bigger than 2. DON'T BORROW! It's a trap!) * Answer: ___