Multiplication Properties
•What is the Identity Property of Multiplication?
•Any number multiplied by 1 stays the same.
Use Place Value Model to Complete 7 x 12, Show your work
•84
7 Tens and 14 Ones
•What is 30×4?
•120
•Round 23×48 to the nearest ten before multiplying.
•20×50=1,000
6 is how many times greater than 3?
•2 times greater
•What is the Zero Property of Multiplication?
•Any number multiplied by 0 equals 0.
•Use base-ten blocks to show 3×20.
3 groups of 2 tens = 60.
•What is 600×2?
•1,200
•Estimate 62×5.
•60×5=300
•10 is how many times greater than 2?
•5 times greater
•What is the Commutative Property of Multiplication?
•Changing the order of factors does not change the product.
•Use Place Value Model to Complete 3 x 45, Show your work
• 135
12 tens and 15 Ones
•What is 70×300?
•21,000
Estimate 347×6 using front-end estimation
•300×6=1,800
•If one ribbon is 5 meters and another is 25 meters, how many times greater?
•5 times greater
•Give an example using both the Commutative and Associative properties.
•Example: (3×5)×2 = 3×(5×2).
•Use Place Value Model to Complete 5 x 24, Show your work
• 120
10 Tens and 20 Ones
•What is 90×900?
•81,000
•Why is estimating helpful before solving?
•It helps check if your actual answer is reasonable.
If a whale is 60 feet and a dolphin is 15 feet, how many times greater?
•4 times greater
•What is the Associative Property of Multiplication?
•You can group factors in different ways and get the same product.
•If 4×6=24, what is 400×6?
•2,400
•What is 4,000×8?
•32,000
Estimate 82×79
•80×80=6,400
•Explain: 400 is 4×100. What does that mean?
400 is 4 times as many as 100