Unit 1 Formative Review 7NR1-5

At sunrise, the outside temperature was 6˚ below zero.  By lunch time, the temperature rose by 13˚ and then fell by 4˚ by night.  What was the temperature at the end of the day?

A. 0˚

B. -0˚

C. 17˚

D. 3˚

• A

• B

• C

• D

Answer explanation

-6 + 13 - 4 = 3

Tags

CCSS.7.NS.A.3

At sunrise, the outside temperature was 1˚ below zero.  By lunch time, the temperature rose by 11˚ and then fell by 3˚ by night.  What was the temperature at the end of the day?

A.0˚

B.7˚

C.-0˚

D.14˚

• A

• B

• C

• D

Answer explanation

-1 + 11 - 3 = 7

Tags

CCSS.7.NS.A.3

Which situations would result in a temperature change of 0˚?  Select all that are correct. (Hint: pay attention to the key words that let you know if it is a positive or negative integer.)

• A. Over a 4 hour period of time the temperature dropped 4˚ each hour.

• B. The temperature dropped 7˚ from 5:00 p.m. to 6:00 p.m.  The temperature then fell 7˚ from 6:00 p.m. to 7:00 p.m.

• C. The temperature decreased 3˚ from 2:00 p.m. to 3:00 p.m.  The temperature then rose 3˚ from 3:00 p.m. to 4:00 p.m.

• D. The temperature rose 8˚ from 1:00 p.m. to 2:00 p.m.  The temperature then increased 8˚ from 2:00 p.m. to 3:00 p.m.

• E. The temperature increased 2˚ from 9:00 p.m. to 10:00 p.m.  The temperature then decreased 2˚ from 10:00 p.m. to 11:00 p.m.

Answer explanation

A. 4 x 4 = 16 not 0

B. - 7 - 7 = -14 not 0

C. -3 + 3 = 0

D. 8 + 8 = 16 not 0

E. 2 - 2 = 0

Tags

CCSS.7.NS.A.3

Which situations would result in a temperature change of 0˚?  Select all that are correct. (Hint: pay attention to the key words that let you know if it is a positive or negative integer.)

• A. Over a 7 hour period of time the temperature dropped 7˚ each hour.

• B. The temperature dropped 7˚ from 5:00 p.m. to 6:00 p.m.  The temperature then increased 7˚ from 6:00 p.m. to 7:00 p.m.

• C. The temperature decreased 3˚ from 2:00 p.m. to 3:00 p.m.  The temperature then dropped 3˚ from 3:00 p.m. to 4:00 p.m.

• D. The temperature rose 8˚ from 1:00 p.m. to 2:00 p.m.  The temperature then decreased 8˚ from 2:00 p.m. to 3:00 p.m.

• E. The temperature increased 2˚ from 9:00 p.m. to 10:00 p.m.  The temperature then increased 2˚ from 10:00 p.m. to 11:00 p.m.

Answer explanation

A. 7 x 7 = 49

B. -7 + 7 = 0

C. -3 - 3 = -6

D. 8 - 8 = 0

E. 2 + 2 = 4

Tags

CCSS.7.NS.A.3

Read the question carefully.

• A

• B

• C

• D

Answer explanation

The distance between the dots is 8. Only Answer Choice A = 8.

Tags

CCSS.7.NS.A.1C

Read the question closely.

• A

• B

• C

• D

Answer explanation

Tags

CCSS.7.NS.A.1C

Type the equation and solution.

Example: 12 - (-9) = 21

Tags

CCSS.7.NS.A.1B

Type the equation and the solution.

Example: 22 - (-8) = 20

Tags

CCSS.7.NS.A.1B