Add using the Make 20 Strategy 1-109
Generalize the Make 10 strategy to the Make 20 strategy. Continue using ten frames to model the parts and total. What's 18 + 6? Break 6 into 2 parts. First make 20, then add the rest. Since 6 = 2 + 4, add 18 + 2 = 20, then add 20 + 4 = 24. Encourage students to think in groups of 10 whenever possible.
