Make addition and subtraction visual and accessible with these easy-to-use number line worksheets for counting up and counting back! Students will gain confidence solving equations to 20 and 100 using number lines—a powerful tool for developing mental math, number sense, and math fluency. This set is perfect for kindergarten, 1st grade, and 2nd grade math review, homework, morning work, or small group reinforcement. The worksheets gradually increase in difficulty, starting with basi