1. Topic 7 Meaning of division
Reteaching

2. SET A : Students will use models to solve division problems involving Sharing and repeated subtraction and record solutions using division number sentences. 3.oa.a.2
There are 12 toys. If 4 toys are put in each box, how many boxes are needed?
12 – 4 = 8 Use repeated subtraction to find how many groups.
8 – 4 = 4 You can subtract 4 three times.
4 – 4 = 0
12 ÷ 4 = 3 You can also divide to find the number of groups.
Three boxes are needed.

3. SET A : Students will use models to solve division problems involving Sharing and repeated subtraction and record solutions using division number sentences.
Remember that you can also think of division as sharing equally.
6 books, 3 shelves
How many books are on each shelf?
18 students, 2 students in each group
How many groups are there?

4. Set B: Students will use multiplication tables to find answers to division problems. 3.oa.a.4, 3.oa.B.6, 3.oa.D.9
Use a multiplication table to find 10 ÷ ÷ 2 = n 2 x n = 10 Find the 2 in the first column of the table, and go across the row to 10. Then go up in the column with the 10 to find the missing factor. 2 x 5 = ÷ 2 = 5

5. Set B: Students will use multiplication tables to find answers to division problems. 3.oa.a.4, 3.oa.B.6, 3.oa.D.9
Remember that you can look for a missing factor in the top row or the left column.
14 ÷ 2 = n
2 x n = 14
35 ÷ 7 = n
30 ÷ 6 = n
18 ÷ 6 = n
6 x n = 18
16 ÷ 4 = n
28 ÷ 4 = n

6. Set C: Students will solve word problems by writing equations that represent the problem solutions. 3.oa.a.3, 3.oa.a.4
Tom has 12 apples to put into bags. Each bag holds 4 apples. How many bags can Tom fill?
Look at the four equations. Choose the one that shows the situation.
A = n C. 12 – 4 = n
B. 12 ÷ 4 = n D. 12 x 4 = n
Tom can find equal groups of apples by dividing.

7. Set C: Students will solve word problems by writing equations that represent the problem solutions. 3.oa.a.3, 3.oa.a.4
Remember that you can draw a picture to show what you know.
Choose the equation that shows the problem.
Emily made 20 muffins. She put 4 muffins in each box. How many boxes could Emily fill?
A = n C. 20 ÷ 4 = n
B. 20 – 4 = n D. 20 x 4 = n

8. Set D: Students will write and solve number stories involving division
Set D: Students will write and solve number stories involving division. 3.oa.a.3
Write a division story for 20 ÷ 5.
If 20 children form 5 equal teams, how many children are on each team?
20 Children
Children on each team
20 ÷ 5 = 4
There are 4 children on each team. 4

9. Set D: Students will write and solve number stories involving division
Set D: Students will write and solve number stories involving division. 3.oa.a.3
Remember that division stories can ask for the number in each group or the number of equal groups. Write a division story for each number sentence.
15 ÷ 3 = ___
21 ÷ 7 = ___
24 ÷ 6 = ___
30 ÷ 5 = ___

10. Set E: Students will solve problems by drawing pictures and using objects. 3.oa.a.3
The messy kids are back! Some green paint spilled on a tile floor. The tile floor was in the shape of a square. There were 9 tiles in the whole floor. How many of the tiles had green paint on them? Draw a picture to show what you know. Finish the picture to solve. Show 9 tiles in all. Six tiles had green paint on them.

11. Set E: Students will solve problems by drawing pictures and using objects. 3.oa.a.3
Remember to check that your picture matches the information in the problem.
Carmella painted over a part of some tiles. The whole group of tiles was in the shape of a rectangle. There were 28 tiles in the whole group. How many tiles did Carmella paint over?