Strategys To Add Within 20 For 1St Grade. Get games, worksheets, and lesson plans for teaching standards 1.oa.3, 1.oa.4, 1.oa.5, 1.oa.6,. Add and subtract within 20, demonstrating fluency for.
Here's a fun video that teaches kids to use addition and subtraction within 20 to solve problems involving situations of adding to, taking from, putting toge. Make 10 to add worksheets within 20. Three more or three less within 20: