Chapter 2 Review

Word Problems

100

Cy sees 18 birds in two days. He sees 10 birds on the first day. How many birds does he see on the second day?

8

100

Mel is a birdwatcher. This week he observed 3 fewer birds than last week. This week he observed 9 birds. How many birds did he observe last week?

12

100

Mel picks 11 strawberries. He uses some to make a fruit cup. What expression shows how many strawberries Mel has left?

11-a

Adding 3 Digits

100

   593

+ 954

1,547

100

   425

+ 306

731

100

   971

+ 772

1,743

Variables

100

h + 7 = 10

3

100

r − 8 = 5

13

100

8 + y = 15

7

Mixed Review

100

What is a SUM?

the answer when you are adding

100

What is a variable?

a letter used to represent an unknown number 

100

What is an expression?

an addition or subtraction problem with no equal sign or answer