This Fluency Activity is a part of the Lesson 5, Unit 6, Grade 4. This fluency activity reviews Lessons 1 and 4. Distinguish tenths from tens for English language learners and others. Some students may not be able to differentiate the th sound at the end of the fraction words from the s sound at the end of tens. If possible, couple Count by Tenths and Hundredths with a visual aid, such as the fraction form, decimal form, or area model.