Main Idea and New Vocabulary Key Concept Division
Main Idea and New Vocabulary Key Concept: Division Property of Equality Example 1: Example 2: Solve Multiplication Equations Example 3: Real-World Example: Solve a Multiplication Equation Key Concept: Multiplication Property of Equality Example 4: Solve Division Equations Example 5: Real-World Example: Solve a Division Equation
• Solve one-step multiplication and division equations. • coefficient • formula
Solve Multiplication Equations Solve 39 = 3 y. Check your solution. 39 = 3 y Write the equation. Division Property of Equality 13 = y Simplify. Answer: The solution is 13. Check 39 = 3 y ? 39 = 3(13) 39 = 39 Write the original equation. Replace y with 13. The sentence is true.
Solve 21 = 3 z. Check your solution. A. 63 B. 24 C. 8 D. 7
Solve Multiplication Equations Solve − 4 z = 60. Check your solution. – 4 z = 60 Write the equation. Division Property of Equality z = – 15 60 ÷ (– 4) = – 15 Answer: The solution is – 15. Check – 4 z = 60 ? – 4(– 15) = 60 60 = 60 Write the original equation. Replace z with – 15. The sentence is true.
Solve 12 x = 36. Check your solution. A. 3 B. 4 C. 24 D. 48
Solve a Multiplication Equation MAIL Serena mailed 138 letters during the last 6 days. On average, how many letters did she mail each day?
Solve a Multiplication Equation 138 = 6ℓ Write the equation. Division Property of Equality 23 = ℓ 138 ÷ 6 = 23 Answer: Serena mailed 23 letters each day.
PIZZA The student council has $175 for a pizza party. Pizzas cost $7 each. How many pizzas can they buy? A. 22 pizzas B. 24 pizzas C. 25 pizzas D. 32 pizzas
Solve Division Equations Solve Write the equation. Multiplication Property of Equality m = – 20 – 10 ● (2) = – 20 Answer: The solution is – 20.
Solve A. – 1 B. 7 C. – 7 D. – 12
Solve a Division Equation DISTANCE The distance d that Lance travels on his bike at a rate of 20 miles per hour for 4 hours is given by the equation How far did he ride? Write the equation. Multiplication Property of Equality d = 80 20 ● 4 = 80 Answer: Lance rode 80 miles.
DISTANCE Kevin is driving an average rate of 60 miles per hour. He has been driving for 2 hours. The distance he has traveled is given by the equation A. 120 miles B. 62 miles C. 60 miles D. 30 miles How far has Kevin driven?
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