If multiplication = repeated addition then, division = ___________ Relate Subtraction to Division If multiplication is repeated addition, then division is repeated subtraction. Lets Model Division Chris has $12 for the book fair. Each book he wants to buy cost $4. How many books can Chris buy?
Lets Model Division Chris has $12 for the book fair. Each book he wants to buy cost $4. How many books can Chris buy? $ 12 4 -4 8 Chris buys one book, spends $4, and has $8 left. Can he buy another book? Lets Model Division Chris has $12 for the book fair. Each
book he wants to buy cost $4. How many books can Chris buy? 8 $ $ 12 -4 4 4 -4 4 8 Chris buys another book, spends another $4, and has $4 left. Can he buy another book?
Lets Model Division Chris has $12 for the book fair. Each book he wants to buy cost $4. How many books can Chris buy? 4 8 $ $ -4 12 -4 4 4 0 -4 4 $
4 8 Chris buys another book, spends another $4, and has $0 left. Can he buy another book? Lets Model Division Chris has $12 for the book fair. Each book he wants to buy cost $4. How many books can Chris buy? 4 8 $ $ -4
12 -4 4 4 0 -4 4 $ 4 8 Chris spent $4 three times. He subtracted $4 three times. So, 12 4 = 3. He can buy 3 books. Lets Model Division Again
Pedro has 15 books he wants to put equally on bookshelves. He has 3 bookshelves. How many books can go on each shelf? Lets Model Division Again Pedro 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
Lets Model Division Again Pedro 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 So far, he has put 2 books on each shelf. He has 9 books left. Can he put
Lets Model Division Again Pedro has 15 books he wants to put equally on bookshelves. He has 3 bookshelves. How many books can go 9 on each shelf? 15 -3 -3 12 12 -3 9
6 So far, he has put 3 books on each shelf. He has 6 books left. Can he put Lets Model Division Again Pedro has 15 books he wants to put equally on bookshelves. He has 3 bookshelves. How many books can go 6 9 on each shelf? -3 15 -3 -3
12 12 -3 9 6 3 So far, he has put 4 books on each shelf. He has 3 books left. Can he put Lets Model Division Again Pedro has 15 books he wants to put equally on bookshelves. He has 3 bookshelves. How many books can go
3 9 6 on each shelf? -3 15 -3 -3 12 12 -3 9 6
-3 3 So far, he has put 5 books on each shelf. He has 0 books left. Can he put 0 Lets Model Division Again Pedro has 15 books he wants to put equally on bookshelves. He has 3 bookshelves. How many books can go 3 9 6 on each shelf?
-3 15 -3 -3 12 12 -3 9 6 -3 3 Pedro can put 5 books on each shelf. The division sentence is 15 3 = 5
0 Lets use a Number Line Pedro has 15 books he wants to put equally on bookshelves. He has 3 bookshelves. How many books can go 3 9 6 on each shelf? -3 15 -3 -3 12
12 -3 9 6 -3 3 0 Lets use a Number Line Pedro has 15 books he wants to put equally on bookshelves. He has 3 bookshelves. How many books can go 3
9 6 on each shelf? -3 15 -3 -3 12 12 -3 9 6 -3
3 Pedro can put 5 books on each shelf. The number line shows 0 To write a division sentence from a repeated subtraction sentence To write a division sentence from a repeated subtraction sentence The dividend is your total or starting number. 12
12 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
To write a division sentence from a repeated subtraction sentence 1 2 3 4 5 6 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 How is division related to subtraction? Exit Ticket Solve the problem below using repeated subtraction: 18 6 = __
Solve the problem below using any strategy: 18 2 = __
