Basic Mathematical Expressions

Write an inequality for the following: 5 less than twice some number is more than 15

• 5 - 2x > 15

• 5 - 2x < 15

• 2x - 5 < 15

• 2x - 5 > 15

Tags

CCSS.7.EE.B.4B

Identify the correct order of operations for this expression: 42 × 10 - 72 ÷ 8

• multiplication, division, subtraction

• multiplication, subtraction division

• subtraction, multiplication, division

• division, multiplication, subtraction

Tags

CCSS.5.OA.A.1

CCSS.5.OA.A.2

Evaluate: 17 - 5 × 4 ÷ 2

Mathematical Equivalence

OFF

Tags

CCSS.5.OA.A.1

CCSS.5.OA.A.2

Evaluate: 15 + 7 × 2 – 11 + 35

Mathematical Equivalence

ON

Tags

CCSS.7.NS.A.3

Evaluate: 18 ÷ 2 × 3 – 17

Mathematical Equivalence

ON

Tags

CCSS.5.OA.A.1

CCSS.5.OA.A.2

Evaluate: 15 ÷ 3 × 2 + 9 ÷ 3

Mathematical Equivalence

ON

Tags

CCSS.5.OA.A.1

CCSS.5.OA.A.2

Evaluate: 4 + 3 × 3 + 8 ÷ 4

Mathematical Equivalence

ON

Tags

CCSS.7.NS.A.3

Addition ALWAYS comes before subtraction.

• True

• False

Answer explanation

The statement in the question is false. In mathematics, the order of operations, often remembered by the acronym PEMDAS, dictates that operations should be performed in the following order: Parentheses, Exponents, Multiplication and Division (from left to right), Addition and Subtraction (from left to right). So, addition does not always come before subtraction.

Tags

CCSS.5.OA.A.1

CCSS.5.OA.A.2

What does PEMDAS mean?

a

b

c

d

e

f

%

+

-

( )

×

&

exponents

#

@

÷

Tags

CCSS.7.NS.A.3

True or false:
Multiplication ALWAYS comes before division.

• True

• False

Tags

CCSS.5.OA.A.1

CCSS.5.OA.A.2