Real Numbers

Question 1

Choose all sets that contain the number –2.22.

Revolt · Accepted Answer

Rational numbers; Real numbers

Question 2

Choose all sets that contain the number 5.

Revolt · Accepted Answer

Natural numbers; Whole numbers; Integers; Rational numbers; Real numbers

Question 3

Which set is closed under subtraction?

Revolt · Accepted Answer

the set of rational numbers

Question 4

The following examples illustrate the commutative property of addition. 7 + 8 + 3 = 7 + 3 + 8 4.6 + 11.4 = 11.4 + 4.6Study the examples, then choose the statement that best describes the property.

Revolt · Accepted Answer

a + b = b + a

Question 5

The following examples illustrate the commutative property of multiplication.5 · 2 · 9 = 2 · 5 · 9 · 2 = 2 · Study the examples, then choose the statement that best describes the property.

Revolt · Accepted Answer

a · b = b · a

Question 6

a + = 0.

Revolt · Accepted Answer

-a

Question 7

Inverse property of multiplication: For all real numbers except , a • = 1.

Revolt · Accepted Answer

0

Question 8

Inverse property of multiplication: For all real numbers except , a • = 1.

Revolt · Accepted Answer

1/a

Question 9

Choose the expression that represents “three less than seven times a number.”

Revolt · Accepted Answer

7x – 3

Question 10

Choose the expression that represents “the product of a number and five is two less than the number.”

Revolt · Accepted Answer

5x = x – 2

Real Numbers Answers

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