1. Today we will discuss about the topic:
Good Afternoon!
Today we will discuss about the topic:
Factors and multiples – multiplication facts
Let’s Warm up:.
1) 147
1) =
2) Round 2,456 to the nearest tens place.
3) Write 654 in word form.
4) 67 – 43 =
5) What is the next number in the pattern?
3, 7, 11, 15,
2) 2,460
3) Six hundred fifty four
4) 24
5) 19
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2. Let’s discuss what we did in the last few sessions.
REVIEW
Let’s discuss what we did in the last few sessions.
PLACE VALUE helps you better understand the WHOLE NUMBERS (0,1,2,3,4,5,6,7,8,9,.....)
We can write numbers in three forms:
We compare numbers using PLACE VALUE.
Many times there are more than 2 numbers that we want to compare. We can "ORDER" the numbers by placing them in an order from
least to greatest OR greatest to least
STANDARD FORM: 423
WORD FORM: Four hundred twenty-three
EXPANDED FORM:
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3. When we ESTIMATE, we find a number that is close to the exact number.
REVIEW
When we ESTIMATE, we find a number that is close to the exact number.
ROUNDING is one of the ways we estimate.
The middle number is called the MEDIAN
SET of data
45, 48, , 69, 74
52,
MEDIAN
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4. There are several properties of addition
REVIEW
There are several properties of addition
COMMUTATIVE PROPERTY:
We can change the order and the sum stays the same.
EXAMPLE: = 10
6 + 4 = 10
ASSOCIATIVE PROPERTY:
We can change the grouping and the sum stays the same.
EXAMPLE: 2 + (3+ 8) = 13
(2 + 3)+ 8= 13
IDENTITY PROPERTY:
We can add zero and the sum stays the same.
EXAMPLE: 7 +0 = 7
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5. Addition and Subtraction are INVERSE OPERATIONS
REVIEW
Addition and Subtraction are INVERSE OPERATIONS
If we subtract 0 from any number, the difference is that same number.
= 13
If we subtract a number from itself, the difference is 0.
= 0
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6. Let’s learn few terms before we proceed!
4 x 5 = 20
Product
Factor
Factor: Number that is multiplied to give a product.
Product: Number that is obtained by multiplying numbers.
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7. There are 3 rows. Each row has 2 stars.
Find: 2 x 3
STEP 1 :
There are 3 rows. Each row has 2 stars.
2 stars Three times two stars is six stars = 6
2 stars + +
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8. Similarly, we can rearrange the stars in the following manner also.
STEP 2 :
Here we have 2 rows and each row has 3 stars.
3 stars +
3 stars
Two times three stars is six stars.
That is = 6.
Hence, the result.
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9. Multiplication by a whole number is REPEATED ADDITION
STEP 3 :
We can show this by a multiplication equation.
2 x 3 = 6
Product
Factor
Factor
Multiplication by a whole number is REPEATED ADDITION
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10. Now here is something for you to do.
There are five groups and each group has four triangles.
Can you tell how many triangles are there in all?
= 5 x 4 = 20
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11. There are several properties of multiplication.
1) COMMUTATIVE PROPERTY:
We can change the order of the factors and the product stays the same.
EXAMPLE: 4 x 3 = 12
3 x 4 = 12
2) IDENTITY PROPERTY:
We can multiply a number by 1 and the product is the number.
EXAMPLE: x 1 = 3
3) ZERO PROPERTY:
We can multiply a number by 0 and the product is zero.
EXAMPLE: x 0 = 0
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12. The order of the factors does not affect the product.
Uses of the properties of multiplication.
1) COMMUTATIVE PROPERTY:
The order of the factors does not affect the product.
4 x 3 =12
4 groups of 3 cans = 12 cans
3 x 4 =12
3 groups of 4 cans = 12 cans
The number of cans remain the same.
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13. The product of 1 and a number is the number.
2) IDENTITY PROPERTY:
The product of 1 and a number is the number.
5 x 1 =5
1 row of 5 cans = 5 cans.
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14. The product of 0 and any number is 0.
3) ZERO PROPERTY:
The product of 0 and any number is 0.
5 x 0 =0
0 rows of 5 cans = 0 cans.
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15. Complete each problem using the
COMMUTATIVE PROPERTY.
"Change the Order" x
3 x 6
6 x 3 =
2 x 5 = x
5 x 2
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16. Complete each problem using the
IDENTITY PROPERTY.
6 x 1 = 6
5 x 1 = 5
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17. Complete each problem using the
ZERO PROPERTY.
0 x 3 =
6 x 0 =
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18. BREAK
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19. Click on the link below for some exciting puzzle
GAME
Click on the link below for some exciting puzzle
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20. Find the product with the help of model.
1) 2 x 2 =
1) 4
2) 21
2) 7 x 3 =
3) 4
3) 4 x 1 =
4) 30
4) 6 x 5 =
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21. 5) Sam Reads 5 pages in one day. How many pages does he reads in 5 days?
5) 25
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22. 6) There are 3 balls in a can of tennis balls
6) There are 3 balls in a can of tennis balls. Write a multiplication sentence to show how many balls are in 4 cans.
6) 3 x 4 = 12 balls
7) Tyler wants to put 5 rows of 3 robot stickers on each page of his sticker album. Write a multiplication sentence to describe how each page will look.
7) 5 x 3 = 15 robot stickers
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23. 8) Lucy has 8 pencils each of green, blue and red colors
8) Lucy has 8 pencils each of green, blue and red colors. How many pencil does she have in all?
8) 24
9) Kayla is using beads to make 4 bracelets. She puts 8 beads on each bracelet. How many beads does she use?
9) 32 beads
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24. 10) Yoshi is putting beads on his Temari ball
10) Yoshi is putting beads on his Temari ball. He makes 3 rows with 7 beads in each. What other way can he put the beads in equal groups and still have 21 beads?
10) 7 rows of 3 beads
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25. Multiplication by a whole number is REPEATED ADDITION
Very Good!
Let's Review
Factor: Number that is multiplied to give a product.
Product: Number that is obtained by multiplying numbers.
Multiplication by a whole number is REPEATED ADDITION
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26. There are several properties of multiplication.
1) COMMUTATIVE PROPERTY:
We can change the order of the factors and the product stays the same.
EXAMPLE: 4 x 3 = 12
3 x 4 = 12
2) IDENTITY PROPERTY:
We can multiply a number by 1 and the product is the number.
EXAMPLE: x 1 = 3
3) ZERO PROPERTY:
We can multiply a number by 0 and the product is zero.
EXAMPLE: x 0 = 0
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27. See you in the next session.
Very well done.
See you in the next session.
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