IXL | Solve equations using properties | 7th grade math

or

What value of n makes this addition sentence true?

Hint: Use properties of addition.

52 = 0 + n

n =

ref_doc_title.

or

Learn with an example

question

What value of s makes this multiplication sentence true?

Hint: Use properties of multiplication.

1 · s = 19

s =

key idea

Identity property:
Multiplying by 1 does not change a number.

solution

To find s, use properties of multiplication to make both sides of the equation look the same.

The identity property says multiplying by 1 does not change a number.

1 · s

=

19

Apply the identity property

s

=

19

Apply the identity property

Now match up the two sides of the equation.

s

=

19

So, s = 19.

Looking for more? Try these:

Lesson: The commutative property

Lesson: The associative property

Lesson: The distributive property

Lesson: The identity property

or

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Teacher tools

Work it out

Not feeling ready yet? These can help:

S.1Properties of addition and multiplication

AA.2Which x satisfies an equation?

Lesson: The commutative property

Lesson: The associative property

Lesson: The distributive property

Lesson: The identity property