Unit 3 Contents

You can draw pictures of rectangles to help you solve these problems.

1. John built rectangles with 20 tiles, but some of his work was erased. Make a data table like this one. Help John fill in the missing numbers.

1. Is 36 an even number? How do you know?
2. Is 36 a square number? How do you know?
3. Find multiples by skip counting. Write the multiples for each number.
1. Multiples of 2: Start at 2 and skip count by 2s to 50.
2. Multiples of 3: Start at 3 and skip count by 3s to 48.
3. Multiples of 5: Start at 5 and skip count by 5s to 50.
4. Multiples of 6: Start at 6 and skip count by 6s to 48.
4. Tell whether the following numbers are even or odd.
1. 10
2. 17
3. 21
4. 44
5. Jane says that any number that ends in 2—such as 12, 72, and 102—is an even number. What other digits can even numbers end in?
1. Which of the following are multiples of 5?

20

34

45

56

60

73

35

2. Can you tell whether a number is a multiple of 5 by looking at the last digit? If so, tell what digits the multiples of 5 end in.