# Find Missing Number Addition Worksheets

How Find Missing Numbers, in Addition, Leads to Algebraic Thinking for Students (i.e. 46 + _7 = 73)? How many times have you been asked in your academic life to find the value of x? If your answer isn't "a lot" then maybe you're skipping school too much. What we are trying to tell you is that finding the value of missing variables is what mathematics is based on. Once you have learned basic operations of arithmetic like addition and subtraction, the complexity then is increased. In the next level, you are asked to get the value of a missing number, and its results are shown to help the process. For example, 46 + _9 = 73. This is a fairly simple equation where all you have been asked is what number needs to be multiplied with 9 and then summed with 46 to get the number 73. What we do here is take every number which is on the left side of the equation to the right and leave the unknown entity on the left. X = (73 – 46) / 9, X = 3.

• ### Basic Lesson

Shows the steps required to add the ones column properly.

• ### Intermediate Lesson

Introduction to basic algebra with the use of reverse arithmetic.

• ### Independent Practice 1

Contains 18 missing numbers addition problems. The answers can be found below.

• ### Independent Practice 2

Contains 18 missing numbers addition problems. The answers can be found below.

• ### Homework Worksheet

Contains 18 missing numbers addition problems. A complete example is provided.

• ### Topic Quiz

10 missing number addition problems. A math scoring matrix is included.