Compare Lengths in Centimeters (cm)
š¬ Tiny comparisons! It's time to compare two objects using centimeter numbers. Do you remember the trick for "comparing"?
Concept
Comparing means finding the difference. And "difference" means subtraction! šÆ **The "Centimeter Difference" Strategy:** **Example:** A green caterpillar is 14 centimeters long. A yellow caterpillar is 8 centimeters long. How much longer is the green one? 1. **Find the Action:** "How much longer?" means Compare. Compare means subtract! 2. **Setup the Math:** Big number minus Small number. (14 - 8). 3. **Solve it!** Use your single-digit ninja counting tricks! (Take 4 to get to 10. Take 4 more. Answer is 6!) 4. **Answer:** The green caterpillar is **6 cm** longer. Centimeters are tiny numbers, so the answers you get will seem a lot bigger than they would if you used inches!
Try it
Find the metric difference! **Instructions:** Read the two measurements in centimeters and subtract to find the difference. **Problem 1:** The blue chalk is 12 cm long. The yellow chalk is 5 cm long. * How much longer is the blue chalk? (12 - 5 = ___) * Answer: ___ cm. **Problem 2:** Your new pencil is 18 cm long. Your old, sharpened pencil is 9 cm long. * How much shorter is the old pencil? (___ - ___) * Answer: ___ cm. **Problem 3:** A leaf is 22 cm wide. A beetle on the leaf is 3 cm wide. * What is the difference in their width? * Answer: ___ cm. **Problem 4:** A big paint brush is 28 cm. A small brush is 15 cm. How much longer is the big brush? * Answer: ___ cm.