Need a quick single-step word problems activity or center? This no prep first grade math freebie has your back! In it, your students will practice the following math skills: two-number word problems, subtraction within 20, and fine motor skills. With its Common Core standards-based focus, this free math worksheet is flexible for many uses: classwork, homework, assessments, fast finisher activities, word problem centers, morning work, homeschool, intervention, sub plans, and much more. 1.OA.A.