# 3rd Grade - Solve Problems With Equations

 Grade Level: 3rd Skill: Equations Topic: Solve Problems with Equations Goal: Solve problems involving numeric equations or inequalities. Skill Description: Algebra and Functions: when to use operational symbols The ability to express a number sentence using standard, recognized symbols.

## Building Blocks/Prerequisites

### Sample Problems

 (1) What symbols do you see sometimes instead of “x”? (? or an empty box) (2) What symbol do we give a number when we don’t yet know its value? (often “x”, but any letter can be used to represent an unknown quantity) (3) How is an inequality solved? If you do a calculation on one side of an equation, you must also do that same operation on the other side. The child will be able to solve equations involving only one operation up to 99. An equation is a mathematical statement that has numbers on either side of an = sign. The numbers on the left side has the same value as the numbers on the right. Solving the equation often means finding the value of the variables or unknown quantities. For example, x = 5 + 10, x = 15 (4) What do I do with an x in an equation? You want to get the “x” all by itself on one side of the equation. The child will be able to formulate and solve problem situations involving one-step equations in one unknown with a whole number solution. (5) Solving equations like these is the beginning of understanding what subject? (algebra)

### Online Resources

 (1) (2) (3)