Unit Two Test

Mathematical Expressions

100

X + 21, when x=10

31

200

X + 33, when x=42

75

300

James has a bookcase with y books in it. His mom bought him 78 more books to add to his collection. How many textbooks does he have in all now?

y + 78

400

Greg went to 12 Phillies games last year. This year, Greg went to x Phillies games. How many Phillies games has Greg gone to in the past two years?

x + 12

500

Ronnie played x hours of video games on Monday. On Tuesday she played 3 hours of video games. On Wednesday she played y hours of video games. How many hours of video games has Ronnie played in the three days?

x + 3 + y

Addition Properties

100

What addition property is shown in this equation?

3 + 9 +10 = 10 + 3 + 9

Commutative property

200

What addition property is shown below?

15 +0 = 15

Identity property

300

What addition property is shown below?

1 + (3 + 9) = (1 + 3) + 9

Associative Property

400

What two properties are shown below?

15 + 0 = 0 + 15

Identity and Commutative

500

What two properties are shown below?

(1 + 2) + 8 = (8 + 2) + 1

Commutative and Associative

Adding two/three addends

100

1,459 + 8,333

 9792

200

1,349 + 91,879

93228

300

2,392 + 9,200 + 8,276

19868

400

1,893,289 + 32,908,376

34,801,665

500

8,492,039 + 10,930,390 + 198,374,563

217,796,992

Estimating

100

Estimate:

4390 + 1928

6,000

200

Estimate:

1,234 + 9,876

11,000

300

Estimate:

8,983 + 21,930

23,000

400

Estimate:

1,839,290 + 3,538,765

6,000,000

500

Estimate:

1,283,902 + 128, 830,239

129,000,000