09162022

Evaluate (-7/8) + (-1 1/3) 

(NC.7.NS.1)

• -2 5/24

• -11/24

• 11/24

• 2 5/24

Answer explanation

-7/8 + (-1 1/3)

= -7/8 + (-4/3)

= -21/24 + (-32/24)

= -53/24

= -2 5/24

Tags

CCSS.7.NS.A.1C

Evaluate -2 - 7.6

(NC.7.NS.1)

• -9.6

• -5.6

• 9.6

• 5.6

Answer explanation

-2 - 7.6

= -2 + (-7.6)

= -9.6

Remember a negative + negative is MORE negative

Tags

CCSS.7.NS.A.1C

A baby otter was born 

3/4 of a month early. At birth, its weight was 7/8 kilograms, which is 0.9 kilogram less than the average weight of newborn otters in the aquarium. What is the average weight of a newborn otter? (NC.7.NS.3)

• 1 31/40 km

  or 1.775 km

• 1 13/20 km

  or 1.65 km

• 1 5/8 km

  or 1.625 km

• 1/8 km

  or 0.125 km

Answer explanation

7/8 + 0.9

= 7/8 + 9/10

= 35/40 + 36/40

= 71/40

= 1 31/40 km

= 1.775 km

Tags

CCSS.7.NS.A.3

Joan did 

1 3/4 loads of laundry on Friday and 1.25 loads of laundry on Wednesday. What fraction of laundry did Joan do in total?  (NC.7.NS.3)

• 3 loads

• 1/2 load

• 3.5 loads

• 2 loads

Answer explanation

1 3/4 + 1.25

= 1.75 + 1.25

= 3 loads

Tags

CCSS.7.NS.A.1C

Evaluate (-7/3) + (-6/5 ) + 4/3

(NC.7.NS.1)

• -2 1/5

• 2 7/15

• 1/5

• -2

Answer explanation

(-7/3) + (-6/5) + 4/3

= (-35/15) + (-18/15) + 20/15

= -33/15

= -2 2/15

Tags

CCSS.7.NS.A.1C

Evaluate -5.7 + (-3.1)

(NC.7.NS.1)

• -8.8

• 8.8

• 2.6

• -2.6

Answer explanation

5.7 - 3.1

= 2.6

Tags

CCSS.7.NS.A.1C

Evaluate (5/-8) - 4 1/2 + (-3/8)

(NC.7.NS.1)

• -5 1/2

• -4 1/4

• 3 3/4

• 4 1/4

Answer explanation

(5/-8) - 4 1/2 + (-3/8)

= (-5/8) + (-9/2) + (-3/8)

= (-5/8) + (-36/8) + (-3/8)

= -44/8

= -5 4/8

= -5 1/2

Tags

CCSS.7.NS.A.3

Keith has 

1 3/8 week's worth of pay in a wallet and 1 1/9 week's of pay in the bank. How many weeks of pay does Keith have?  (NC.7.NS.3)

• 2 35/72 weeks

• 2 1/2 weeks

• 2 5/18 weeks

• 2 13/15 weeks

Answer explanation

1 3/8 + 1 1/9

= 11/8 + 10/9

= 99/72 + 80/72

= 179/72

= 2 35/72

Tags

CCSS.7.NS.A.1C

Gracie has a total of 

10 3/4 yards of string for her craft project.  She cuts 3.7 yards of string on the first day.  The next day she uses 4 1/5 yards of string.  She needs 3.25 yards of string to finish her project.  Will she have enough string?  If so, how much does she have left over?  If not, how much string does she need? (NC.7.NS.3)

• No, she needs 2/5 more yards

• Yes, she has 2/5 yards left

• No, she needs 2 17/20 more yards

• Yes, she has 2 17/20 yards left

Answer explanation

3.7 + 4 1/5 + 3.25

= 3.7 + 4.2 + 3.25

= 11.15

11.15 - 10 3/4

= 11.15 - 1.75

= 2/5 yards needed

= 0.4 yards needed

Tags

CCSS.7.EE.B.3

Evaluate (-5/6) - (-7/8) - (-4/6) 

(NC.7.NS.1)

• 17/24

• -17/24

• -17/48

• 17/48

Answer explanation

(-5/6) - (-7/8) - (-4/6)

= (-20/24) + 21/24 + 16/24

= 17/24

Tags

CCSS.7.NS.A.3