IXL | Properties of addition

Type the missing number that makes this addition sentence true.

Hint: Use properties of addition.

6 + =

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Learn with an example

question

Using the associative property, type the missing numbers that make this addition sentence true.

Hint: There are many possible answers, but only ones obtained using the associative property will be considered correct.

( + 9) + 2 =

7 + (9 + )

key idea

Associative property:
You can group the addends with parentheses and get the same sum.

solution

Use the associative property. The two sides of the equation should use the same numbers but have different grouping. 7 and 2 must go in the blanks.

Looking for more? Try these:

Lesson: The commutative property

Lesson: The associative property

Lesson: The identity property

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Teacher tools

Work it out

Not feeling ready yet? These can help:

Lesson: The commutative property

Lesson: The associative property

Lesson: The identity property

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