multiplication= repeated addition then, division= ___________ if…
DESCRIPTION
Let’s Model Division Chris has $12 for the book fair. Each book he wants to buy cost $4. How many books can Chris buy?TRANSCRIPT
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multiplication = repeated addition
then, division = ___________
If…
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Relate Subtraction to Division
If multiplication is repeated addition, then
division is repeated subtraction.
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Let’s Model DivisionChris has $12 for the book fair. Each book he wants to buy cost $4. How
many books can Chris buy?
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Let’s Model DivisionChris has $12 for the book fair. Each book he wants to buy cost $4. How
many books can Chris buy? 12- 4 8
Chris buys one book, spends $4, and has $8 left.
Can he buy another book?
$4
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Let’s Model DivisionChris has $12 for the book fair. Each book he wants to buy cost $4. How
many books can Chris buy? 12- 4 8
Chris buys another book, spends another $4, and has $4 left.
Can he buy another book?
8- 4 4
$4
$4
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Let’s Model DivisionChris has $12 for the book fair. Each book he wants to buy cost $4. How
many books can Chris buy? 12- 4 8
Chris buys another book, spends another $4, and has $0 left.
Can he buy another book?
8- 4 4
4- 4 0
$4
$4
$4
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Let’s Model DivisionChris has $12 for the book fair. Each book he wants to buy cost $4. How
many books can Chris buy? 12- 4 8
Chris spent $4 three times. He subtracted $4 three times.
So, 12 ÷ 4 = 3. He can buy 3 books.
8- 4 4
4- 4 0
$4
$4
$4
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Let’s Model Division AgainPedro has 15 books he wants to put equally on bookshelves. He has 3
bookshelves. How many books can go on each shelf?
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Let’s Model Division AgainPedro has 15 books he wants to put equally on bookshelves. He has 3
bookshelves. How many books can go on each shelf?
15- 3
12
So far, he has put 1 book on each shelf. He has 12 books left. Can he put
another book on each shelf?
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Let’s Model Division AgainPedro has 15 books he wants to put equally on bookshelves. He has 3
bookshelves. How many books can go on each shelf?
15- 3
12
So far, he has put 2 books on each shelf. He has 9 books left. Can he put
another book on each shelf?
12- 3 9
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Let’s Model Division AgainPedro has 15 books he wants to put equally on bookshelves. He has 3
bookshelves. How many books can go on each shelf?
15- 3
12
So far, he has put 3 books on each shelf. He has 6 books left. Can he put
another book on each shelf?
12- 3 9
9- 3 6
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Let’s Model Division AgainPedro has 15 books he wants to put equally on bookshelves. He has 3
bookshelves. How many books can go on each shelf?
15- 3
12
So far, he has put 4 books on each shelf. He has 3 books left. Can he put
another book on each shelf?
12- 3 9
9- 3 6
6- 3 3
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Let’s Model Division AgainPedro has 15 books he wants to put equally on bookshelves. He has 3
bookshelves. How many books can go on each shelf?
15- 3
12
So far, he has put 5 books on each shelf. He has 0 books left. Can he put
another book on each shelf?
12- 3 9
9- 3 6
6- 3 3
3- 3 0
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Let’s Model Division AgainPedro has 15 books he wants to put equally on bookshelves. He has 3
bookshelves. How many books can go on each shelf?
15- 3
12
Pedro can put 5 books on each shelf. The division sentence is 15 ÷ 3 = 5
12- 3 9
9- 3 6
6- 3 3
3- 3 0
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Let’s use a Number LinePedro has 15 books he wants to put equally on bookshelves. He has 3
bookshelves. How many books can go on each shelf?
15- 3
12
12- 3 9
9- 3 6
6- 3 3
3- 3 0
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Let’s use a Number LinePedro has 15 books he wants to put equally on bookshelves. He has 3
bookshelves. How many books can go on each shelf?
15- 3
12
12- 3 9
9- 3 6
6- 3 3
3- 3 0
Pedro can put 5 books on each shelf. The number line shows
15 ÷ 3 = 5
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To write a division sentence from a repeated subtraction sentence…
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To write a division sentence from a repeated subtraction sentence…
• The dividend is your total or starting number. 12
12 ÷
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To write a division sentence from a repeated subtraction sentence…
• The dividend is your total or starting number. 12
• The divisor is the number you are subtracting. 2
12 ÷ 2
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To write a division sentence from a repeated subtraction sentence…
• The dividend is your total or starting number. 12
• The divisor is the number you are subtracting. 2• Your quotient is how many times you subtracted
until you got to zero. 6
12 ÷ 2 = 6
1 2 3 4 5 6
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How is division related to subtraction?
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Exit TicketSolve the problem below using repeated subtraction:
18 ÷ 6 = __Solve the problem below using any strategy:
18 ÷ 2 = __