Add three numbers together

Today we will learn how to add three numbers together. Math helps us solve problems and understand the world around us.

Doubles facts are addition facts where both addends are the same: 1+1=2, 2+2=4, 3+3=6, 4+4=8, 5+5=10, 6+6=12. Memorizing doubles is easy because you can visualize two equal groups. Doubles plus one: if you know 4+4=8, then 4+5=9 (one more). When adding three numbers, look for doubles first: 3+4+3 → (3+3)+4 = 6+4 = 10. Another strategy: make a ten first: 5+7+5 → (5+5)+7 = 10+7 = 17. These strategies leverage known facts to make mental addition faster.

Let's break this down step by step so it's easy to understand. Follow along with the examples, and don't worry if it takes some practice to get the hang of it!

Remember: Making mistakes is part of learning. If something is tricky, try again, look at the examples, or ask for help.