# multiplication = repeated addition then, division

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 = __

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