Dividing Real Numbers

If a = 4, c = (-1/2), find a/c.

• -2

• 2

• 8

• -8

Answer explanation

$a\div c=4\div\left(-\frac{1}{2}\right)=4\cdot\left(-2\right)=-8$

Tags

CCSS.7.NS.A.2B

If a = 4 and c = (-1/2), find c/a.

• -2

• 2

• -1/8

• 1/8

Answer explanation

$c\div a=\left(-\frac{1}{2}\right)\div4=\left(-\frac{1}{2}\right)\cdot\frac{1}{4}=-\frac{1}{8}$

Tags

CCSS.7.NS.A.2B

If p is positive, n is negative, and z is zero, (pn)/z is

• positive

• negative

• zero

• undefined

Answer explanation

Division by zero is undefined.
E.g. $\frac{3\cdot\left(-2\right)}{0}=\frac{-6}{0}$

Tags

CCSS.7.NS.A.2A

CCSS.7.NS.A.2B

22 ÷ (-2)

• 20

• 11

• -11

• -24

Tags

CCSS.7.NS.A.2A

CCSS.7.NS.A.2B

(-25) ÷ (-5)

• 5

• -5

• -20

• -30

Tags

CCSS.7.NS.A.2A

CCSS.7.NS.A.2B

14 ÷ (-2)

• -12

• 7

• -7

• 16

Tags

CCSS.7.NS.A.2A

CCSS.7.NS.A.2B

What is the reciprocal of 2?

• -2

• 1/2

• 4

• 0.2

Evaluate:
−30÷2

• −15

• 15

• 10

• −10

Tags

CCSS.7.NS.A.2A

CCSS.7.NS.A.2B

A negative divided by a positive is a ________

• positive

• negative

Tags

CCSS.3.OA.D.9

Divide.

• -2/3

• 2/3

• -3/8

• 3/8

Tags

CCSS.7.NS.A.2B