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Multiplication Comparisons
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What you will learn from this videoWhat you will learn
- We'll learn how to interpret multiplication equations as comparisons.
- That we can use multiplicative comparisons to solve real world problems.
- And we'll discover that this knowledge can help us count our prizes, clean up a mess, and make delicious ice cream!
- Discussion Questions
Before Video
How can you use repeated addition to find 6 groups of 7?ANSWER7 + 7 + 7 + 7 + 7 + 7.
Multiplication.
6 × 7 = 42.
8 times 4.
8 + 5 = 13. Jerry has 13 goats.
After Video
Travis is 9 years old. His uncle is 5 times as old as Travis. Find Travis's uncle's age using multiplication. ANSWER9 × 5 = 45 years old.
Multiply.
24 cups of flour.
12 x 4 = 48 fish.
7 x 3 = 21 cat toys.
- Vocabulary
- Multiplication DEFINE
When you multiply two whole numbers, a and b, you are repeatedly adding a to itself b times. Multiplication is shown using an ✕ symbol.
- Factor DEFINE
A factor is one of the numbers being multiplied.
- Product DEFINE
A product is the result of multiplying.
- Compare DEFINE
When you compare numbers, you identify which number is the greater quantity. You can also compare numbers in terms of how much greater or how many times greater one number is.
- Multiplicative comparison DEFINE
Comparing two amounts using multiplication.
- Additive comparison DEFINE
Comparing two amounts using addition.
- Array DEFINE
An arrangement of objects or shapes into equal rows and columns.
- Bar model DEFINE
A model that represents numbers using bars or boxes.
- Multiplication DEFINE
- Reading Material
- Practice Word Problems
- Practice Number Problems
- Lesson Plan
- Teacher Guide
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Level 1
There are 5 bagels on the first rack. There are 4 times as many bagels on the second rack. How many bagels are there on the second rack?
Level 2
There are 15 apples on a small apple tree. There are 5 times as many apples on a larger apple tree. How many apples are on the larger apple tree?
Level 3
Use the numbers 30, 5, and 6 to write a word problem telling how many rocks you and a friend each collected on a hike.
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