Topic F provides students the opportunity to focus on solving various problem types and learn from their peers’ strategies. Lessons 25 and 26 focus on the most challenging Grade 1 problem types: compare with bigger unknown and compare with smaller unknown (1.OA.1). Students continue to strengthen their ability to recognize compare problem types and solve for unknowns in varied positions. They also work with problem types that suggest the incorrect operation, such as, “Shanika went down the slide 15 times. She went down 3 more times than Fran. How many times did Fran go down the slide?” While students do not need to master this problem type in Grade 1, exposure to these problems can support students’ long-term success. During Lesson 26, students are provided more time to practice the various problem types and to learn to persevere in problem solving. Students then practice all of the problem types they have encountered throughout the year in Lesson 27. They discuss their methods for solving the problems and explain their work, including such questions as, “How does Student A’s work help her solve the problem? How does Student B’s work help him solve the problem? What compliment can we give Student A? What might Student A do to improve her work? What do you notice about your own work after looking at Student A’s and Student B’s work?”

## Grade 1 Mathematics Module 6, Topic F

## Downloadable Resources

## Common Core Learning Standards

CCLS | State Standard |
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1.OA.1 | Use addition and subtraction within 20 to solve word problems involving situations of adding to,... |