What is a number line? A number line is a straight line with numbers written in order from lowest to highest. Number lines can go up to any number, such as 10, 20, or even more! They help you to see ...

Addition & subtraction strategies to solve two-digit equations using an open number line. In this lesson, students go over using different addition and subtraction strategies to solve two-digit ...

There are two rules to remember when adding or subtracting fractions. The fractions need to have a common denominator. This means the denominator has to be the same. You only need to add or subtract ...