This Fluency Activity is a part of the Lesson 2, Unit 3, Grade 2. Keep students challenged and engaged by adding a new layer of complexity to the activity in this second round. The following are suggestions for how to adapt the sequence demonstrated in Lesson 1 to match students' ability level. Suggestions are given in order from least to most complex. Subtract 9 and then 8 from multiples of 10 up to 100. Subtract any two-digit number from a multiple of 10 up to 100 (e.g., 30 - 13, 40 - 24, 60 - 45).