Grade 4 · Math · Lesson 13

Apply Order of Operations

When an expression contains more than one operation, the order in which you calculate matters. Mathematicians follow a set of rules — the order of operations — so that everyone gets the same answer. For Grade 4, the rule is: parentheses first, then multiplication and division left to right, then addition and subtraction left to right.

What this lesson teaches

1State the order of operations: parentheses, multiplication and division, then addition and subtraction
2Evaluate expressions with two or more operations using the correct order
3Identify errors caused by applying operations in the wrong order
4Write and solve expressions using parentheses to change the value

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