Display, Explain, and Justify Mathematical Ideas and Arguments Using Precise Mathematical Language

• Distributive Property
• Division Property of Order

Tags

8.PAR.3.4

• No, because it should be multiplied by a power of 20.

• Yes, because it has a decimal and an exponent

• No, because the number is less than 10

• Yes, because the number is between 1 and 10 and being multiplied by a power of 10.

• A
• B
• C
• D

Tags

CCSS.HSS.IC.A.1

CCSS.HSS.IC.B.4

Which justification would be used for STEP 5?

• Addition Property of Equality

• Subtraction Property of Equality

• Combine Like terms

• Division Property of Equality

• Distributive property

Solve for x and find the side lengths

Answer notation:

x=

a=

b=

• No, because it should be multiplied by a power of 20.

• Yes, because it has a decimal and an exponent

• No, because the number is less than 10

• Yes, because the number is between 1 and 10 and being multiplied by a power of 10.

Tags

CCSS.6.EE.A.1

What should be the reason for step 4?

• Reflexive Property of Equality

• Subtraction Property of Equality

• Division Property of Equality

• Substitution

Tags

CCSS.HSA.REI.A.1

Justify step #5 (justify means provide the reason).

• Subtraction Property of Equality and then Simplify

• Addition Prop. of Eq. and then Simplify

• Combine Like Terms

• Definition of Angle Bisector and then Simplify

Find x

Mathematical Equivalence

ON

Which reason justifies the statement below?

<4 ≃ <2

• Defintion of Congruence

• Definition of Vertical Angles

• Angle Addition Postulate

• Supplements Theorem

Tags

CCSS.HSG.CO.B.6

CCSS.HSG.CO.C.9