Solving Integer Equations

-15 + 20

• 5

• -5

• 35

• -35

Answer explanation

The signs of the numbers are different, so we need to subtract. 20 - 15 = 5. Since we have more positives, the answer is 5

Tags

CCSS.7.NS.A.1C

-12 + (-8)

• 20

• -20

• 4

• -4

Answer explanation

The signs of the numbers are the same, so we need to add ("Same sign, sum"). 12 + 8 = 20. Since we only have negatives, the answer is -20

Tags

CCSS.7.NS.A.1C

-1 - 5

• 4

• -4

• 6

• -6

Answer explanation

Every time we see the subtraction sign, we are going to replace it with the word, "negative." So this is -1 and -5. -1 and -5 would be -6

Tags

CCSS.7.NS.A.1C

-4 - (-9)

• 5

• -5

• 13

• -13

Answer explanation

Every time we see the subtraction sign, we are going to replace it with the word, "negative." So this is -4 and "negative, negative 9". "Negative, negative 9" would actually be +9, so -4 and +9 = +5

Tags

CCSS.7.NS.A.1C

8 x (-2)

• 16

• -16

• 4

• -4

Answer explanation

A positive times a negative is a negative.

Tags

CCSS.7.NS.A.2A

CCSS.7.NS.A.2B

-5 x (-4)

• 1

• -1

• 20

• -20

Answer explanation

A negative times a negative is a positive.

Tags

CCSS.7.NS.A.2A

CCSS.7.NS.A.2B

 $-10\ \div\ \left(-2\right)$  

• 5

• -5

• 20

• -20

Answer explanation

A negative divided by a negative is a positive.

Tags

CCSS.7.NS.A.2A

CCSS.7.NS.A.2B

 $-30\ \div\ 3$  

• 10

• -10

• 90

• -90

Answer explanation

A negative divided by a positive is a negative.

Tags

CCSS.7.NS.A.2A

CCSS.7.NS.A.2B

What is the opposite of addition?

• Addition

• Subtraction

• Multiplication

• Division

Answer explanation

Addition and subtraction are inverse, or opposite, operations

Tags

CCSS.7.NS.A.1C

What is the opposite of division?

• Addition

• Subtraction

• Multiplication

• Division

Answer explanation

Multiplication and division are inverse, or opposite, operations

Tags

CCSS.3.OA.C.7