Subtraction Sentences Using Number Lines - Up to 20
āŖ Put it in reverse! When we subtract on a number line, our frog jumps backward. Let's read the backward hops!
Concept
A number line is great for subtraction because you can actually SEE the numbers getting smaller. šÆ **Reading Backward Hops:** Imagine a frog hopping backwards (to the LEFT). 1. **The Starting Point:** Look for the dot at the highest number. Where did the frog start? It started on **15**. 2. **The Backward Hops:** Count the curved jumps going backward. It hopped backward **4** spaces. 3. **The Landing Spot:** Where is the final dot? It landed on **11**. **The Math Sentence:** Start - Hops = Landing Spot **15 - 4 = 11**.
Try it
Read the backward jumps! **Instructions:** Imagine the frog jumping backward to write the math sentence. **Problem 1:** A frog starts at 18. It hops 3 spaces backward. Where does it land? * Sentence: ___ - ___ = ___ **Problem 2:** A frog starts at 14. It hops backward and lands on 9. How many hops did it take? * Equation: 14 - ___ = 9 * Answer: ___ hops **Problem 3:** You see a picture: The start dot is at 20. There are 5 backward jumps. What is the landing spot? * Sentence: 20 - 5 = ___ * Answer: ___