Addition Fact Fluency up to 20
ā”ļø Become a Lightning Calculator! Now that you know all the strategies, it's time to practice until you are super fast.
Concept
You have learned so many awesome addition tricks: 1. **Count On:** (Good for adding 1, 2, or 3) 2. **Super Doubles:** (Like 6+6=12) 3. **Near Doubles:** (Like 6+7 is just 6+6 plus 1 more) 4. **Make Ten:** (For adding big numbers like 8 and 9) **What is Fluency?** Fluency means you can solve these problems quickly and correctly, without having to stop and think too long. When you are fluent, the math facts just pop into your brain! šÆ **How to become fluent:** * **Practice every day.** Just 5 minutes a day makes a huge difference. * **Look for patterns.** If you know 4+5=9, then you know 14+5=19! * **Trust the strategies.** Don't count on your fingers if you don't have to.
Try it
Lightning Round! Use your best strategies to solve these quickly. **Instructions:** Write the answer to each fact. Try not to use your fingers! **Level 1: Quick Facts** 1. 10 + 5 = ___ 2. 6 + 6 = ___ 3. 9 + 2 = ___ **Level 2: Strategy Time** 4. 8 + 7 = ___ (Hint: Near Double or Make 10) 5. 9 + 6 = ___ (Hint: Make 10) 6. 4 + 7 = ___ (Hint: Turnaround and Count On) **Level 3: The Big Ones** 7. 8 + 8 = ___ 8. 7 + 9 = ___ 9. 5 + 8 = ___ **Problem 10:** What strategy did you use to solve 7 + 9? _____________________________