Chapter 2 Summative

(-5.36) + 2.6

• -2.76

• 2.76

• 7.96

• -7.96

Tags

CCSS.7.NS.A.1C

(-4.6) + (-0.6)

• 4

• -4

• 5.2

• -5.2

Tags

CCSS.7.NS.A.1C

0.6 - (-0.5)

• -1.1

• 1.1

• 0.1

• -0.1

Tags

CCSS.7.NS.A.1C

(-0.43) - 5.83

• -5.43

• 5.43

• -6.26

• 6.26

Tags

CCSS.7.NS.A.1C

−1.2 x −3.4

• −4.08

• −4.8

• 40.8

• 4.08

Tags

CCSS.7.NS.A.2A

45.1 x -7

• -31.57

• -315.7

• 3,157

• -3.157

Calculate

0.6÷5

• 0.1

• 0.12

• 0.012

• 1.02

Calculate

-5.75÷-0.25

• 0.23

• -23

• 2.03

• 23

The tallest skateboard ramp is  $3\frac{1}{4}$  feet high.  Another skateboard ramp is  $2\frac{1}{2}$  feet high.  What is the difference between the ramps?

• 3/4 feet

• 2 feet

• 23/4 feet

• 4/3 feet

READ THE PROBLEM. LOOK AT THE STUDENT'S WORK. WHAT DID THEY DO WRONG?

QUESTION:

Susan has a balance of $23.56 in her account. She buys an item for $25. What is her new balance?

STUDENT WORK:

23.56 - 25 =

25.00 - 23.56 = 1.44

ANSWER: $1.44 in Susan's account

• The student should have added the two decimals. The answer is $48.56 in Susan's account.

• The student did everything correct.

• The student should have rewritten the subtraction problem as addition. Then, the answer would be -$1.44 in Susan's account.