Adding and subtracting rational numbers

What 1/2 + (-1/2)?

• 0

• 1/2

• -1/2

• 1.4

Tags

CCSS.7.NS.A.1B

The city of Kuttanad, India, has an elevation of −2.14 meters. The area near the mouth of the Dniester River in Moldova has an elevation that is the opposite of the elevation of Kuttanad.

What is the elevation near the mouth of the Dniester River?

(a)  

Tags

CCSS.7.NS.A.1B

What is the additive inverse of 2/3?

• -2/3

• 3/2

• 2/3

• -3/2

Tags

CCSS.7.NS.A.1B

Select the rule for ADDING rational numbers.

• Keep, Change, Change. Then follow addition rules

• Same sign positive, different sign negative.

• Same sign add, different sign subtract. Same sign keep the sign, different keep the larger sign.

Tags

CCSS.7.NS.A.1B

Identify the property being used: 16+(-16)=0

• The Associative Property

• The Identity Property

• The Inverse Property

• The Commutative Property

Tags

CCSS.7.NS.A.1B

The sum of a number and it's opposite is zero.

• True

• False

Tags

CCSS.7.NS.A.1B

Which shows an equivalent expression to -1/3 - (-5/12)

• 1/3 + 5/12

• -1/3 + 5/12

• 1/3 + (-5/12)

• -1/3 + (-5/12)

Tags

CCSS.7.NS.A.1B

Select all groups in which  $\frac{-5}{1}$  is a member.

• W

• Z

• Q

• I

• R

Tags

CCSS.7.NS.A.1B

2½ + (-2½) =

• 5

• 0

• 2½

• -2½

Tags

CCSS.7.NS.A.1B

The __________ of a number is its opposite.

• additive identity

• additive inverse

Tags

CCSS.7.NS.A.1B