My students needed extra practice with 'missing parts'. I created five different worksheets to allow plenty of opportunities to practice this skill. In the begining of first grade, students will need to use counters to help visualize the problem.
After practicing the skill with the whole class, the students can complete one of the worksheets on their own. I have also included a parent note to send home. I will use some of the worksheets as "homework". I created several worksheets which allow me to reteach the skill on a second day and then follow up with another opportunity for assessment. Extra Practice 5 is the same skill but the students are working with larger numbers.