Want to teach your 3rd-grade student about subtraction and addition? Then look no more! Try the following math worksheet to help students learn the basic concept of subtraction. As you can see here, the primary task is to solve each subtraction problem by coloring each marker using the color code mentioned in the right box. For instance, the value of 10-9 is one. So the first marker will be colored gray. Similar to this, the value of 8-5 is three. So, the student will color the second marker brown, and so on. This way, you are teaching your students about mathematics and improving their coloring skills.