Justifying Equalities and Equations Using Properties of Operations

Solve the equation.
19 = p + 5

• 14

• p = 24

• p = 14

• p = -14

Tags

CCSS.6.EE.B.7

Summarize how you solve the equation below.

• Subtract 12 from both sides of the equation. (take 12 from the 12 +x side and take 12 away from 50)

• Subtract 12 from the right side of the equation. (just take 12 away from the 12 + x side)

• Subtract 50 from both sides of the equation. (take 50 away from the 12 +x side and 50 away from 50)

• Combine 50 and 12

Tags

CCSS.6.EE.B.7

Solve the equation
c - 21 = 45

• 66

• 62

• 24

• none of the above

Tags

CCSS.6.EE.B.7

Solve the equation

y + 8.3= 12.7

• 28

• 21

• 4.2

• 4.4

Tags

CCSS.6.EE.B.7

What is the reason for step 2

Tags

CCSS.HSA.REI.A.1

What is the reason for step 3

Answer explanation

you're just combining like terms; that's NOT addition property.

It's simplifying the problem, or, more technically, substitution.

Tags

CCSS.8.EE.C.7B

Match the expression to the property listed that is being shown.  You may use them more than once.(Type your 5 letters lower case and with no spaces in between like: abcab)

Tags

CCSS.6.EE.A.3

Match the expression to the property listed that is being shown.  You may use them more than once. (Type your 5 letters lower case and with no spaces in between like: abcab)

Tags

CCSS.7.NS.A.1D

Match the following properties.

• Distributive property

• An equation is still true when both sides are divided by the same number.

• Addition property

• An equation is still true when the same number is subtracted from both sides.

• Division property

• An equation is still true when both sides are multiplied by the same number.

• Subtraction property

• 
• Multiplication property

• An equation is still true when the same number is added from both sides.

Tags

CCSS.HSA.REI.A.1

Match the statement to the property it illustrates.

• Addition Property of Zero

• Distributive Property

• Multiplication Property of One

• Multiplication Property of Zero

Tags

CCSS.6.EE.A.3