Unit 3 Contents

Mrs. Brown divided her class into groups for a project. There were 9 groups with 2 students in each group.

You can use addition to show the number of students in all the groups:
2 + 2 + 2 + 2 + 2 + 2 + 2 + 2 + 2

To show this, we had to write 2 nine times. A shorter way to write the number of students in all the groups is with multiplication:
9 2
We read this “9 times 2.” This is the number of things in 9 groups of 2 things.

After we figure out what the answer is by counting, adding, skip counting, or some other way, we can show it with a number sentence:
9 2 = 18

Use the picture of the toy store to answer the following questions.

1. There are four clocks in the picture. Each clock has three hands. How many hands are on the clocks altogether? How did you find out?
2. The clock hands come in four groups of three hands. Other items in the picture also come in groups. Some of them are listed below. How many of each item are there altogether? Show or tell how you know.
1. Tennis balls in packages
2. Eyes on dolls
3. Legs on horses
4. Teacups in tea sets
5. Wheels on motorcycles
3. Tina the Tennis Pro bought five packages of tennis balls.
1. How many tennis balls did she buy altogether?
2. Write a multiplication sentence that shows your answer.
4. Mary received two Tea Time sets for her birthday. Including Mary, how many people can attend her tea party? Show or tell how you know.
5. Alex bought one of the horses. How many legs are on the horses in the store now? Show or tell how you know.