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### Grade 3 - Mathematics2.11 Order of Operations Involving +, -, and *

• When performing arithmetic operations there can be only one correct answer.
• In order to avoid this kind of confusion, Mathematicians have devised a standard order of operations for calculations involving more than one arithmetic operation.
Method:
1. Perform any calculations inside parentheses.
2. Perform all multiplications and divisions, working from left to right.
3. Lastly, perform all additions and subtractions, working from left to right.
Example:
Evaluate the following arithmetic expression: 4 + 5 x 3
Solution:
 Solution 1 Solution 2 4 + 5 x 3 = 9 x 3 = 27 4 + 5 x 3 = 4 + 15 = 19 Incorrect Correct

Directions: Evaluate the following arithmetic expressions. Also write at least ten examples of your own using operations: addition, subtraction, multiplication and division.
 Q 1: Find the answer: 15 * 5 + 1 Answer: Q 2: Find the answer: 12 * 9 + 5 Answer: Q 3: Find the answer: 13 - 8 * 4 Answer: Q 4: Find the answer: 10 * 5 + 1 Answer: Q 5: Find the answer: 15 - 5 - 1 Answer: Question 6: This question is available to subscribers only! Question 7: This question is available to subscribers only! Question 8: This question is available to subscribers only! Question 9: This question is available to subscribers only! Question 10: This question is available to subscribers only!