1ST GRADE ADD AND SUBTRACT FLIP BOOK iREADY® MATH UNIT 5 LESSON 18 FUN ACTIVITY CRAFT This Flip Book Project is a great companion for iReady® Math.This project is a great addition to any Math Curriculum for First Grade. It offers your students extensive practice with practicing how to: o Describe the numbers 10, 20, 30, 40, 50, 60, 70, 80, and 90. as a number of groups of ten and 0 ones. o Add and subtract multiples of 10 to and from other multiples of 10. o Add multiples of 10 to any two-digi