Your First Answer

Part of the Numbers & Operations section of Coddy's Pre-Algebra journey. Lesson 1 of 57.

What is $2+3\cdot 4$ ?

Ask ten people and you get two answers: 20 and 14. Both groups are sure. Only one answer is right.

The rule: multiply before you add, so $2+3\cdot 4 = 14$ .

(The dot means times.)

Challenge

A cinema ticket costs 15 dollars. A drink costs 4 dollars. You buy one ticket and three drinks: $15+3\cdot 4$ dollars. How much do you pay? Type the total.

Try it yourself

15+3\cdot 4

Simplify

All lessons in Numbers & Operations

1Order of Operations

Your First AnswerLeft to Right Parentheses First Brackets Inside Brackets The Fraction Bar Groups Recap: Order of Operations

4Adding Integers

Adding Two Negatives Different Signs Zero Pairs Adding Several Integers Recap: Adding Integers

7Exponents

Repeated Multiplication Squares and Cubes Powers of Ten Negative Bases Where the Minus Sits Recap: Exponents

10Numbers in Stories

Temperature Changes Money Owed Up and Down Equal Shares Recap: Number Stories

2Mental Math

Friendly Pairs Take Away the Total Recap: Mental Math

5Subtracting Integers

Add the Opposite Subtracting a Negative Plus and Minus in a Row Distance Between Numbers Recap: Subtracting Integers

8Square Roots

Perfect Squares Undoing a Square Roots in Expressions The Root Sign Groups Between Two Whole Numbers Recap: Square Roots

11Final Challenges

Final: Every Rule at Once Final: Roots and Powers Final: The Freezer Final: Over the Bar Final: On the Line

3Negative Numbers

Below Zero Opposites Greater or Less Absolute Value Recap: The Number Line

6Multiplying and Dividing

Negative Times Positive Two Negatives Counting the Negatives Dividing Integers Zero in Division Recap: Multiply and Divide

9Putting It All Together

Powers Before Products Negatives Inside Negative Bases in Sums Everything at Once Recap: The Full Order