Mathematics
Grade 8
15 min
Properties of addition
Properties of addition
What you'll learn
- Identify the commutative, associative, and identity properties of addition when presented with numerical equations.
- Apply the associative and commutative properties of addition to simplify numerical expressions and solve problems with at least 80% accuracy.
- Explain, using examples, how the identity property of addition (adding zero) affects the sum of any number.
- Solve multi-step addition problems by strategically using the properties of addition to make calculations easier, demonstrating understanding through written explanations of the steps taken.
Tutorial Preview
1
Commutative Property: (-5) + 8 = 8 + (-5)
2
Associative Property: (2 + 7) + (-4) = 2 + (7 + (-4))
3
Identity and Inverse Properties: 12 + 0 and 12 + (-12)
Sample Practice Questions
Easy
Find the missing number: 3 + 9 = ? + 3
0.9
1.3
2.12
3.6
Easy
Which equation shows the commutative property of addition?
0.5+2=2+5
1.5+0=5
2.5-2=3
3.5*2=10
Easy
Find the missing number: (1 + 2) + 3 = 1 + (? + 3)
0.2
1.1
2.3
3.6
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Frequently asked questions
What grade level is "Properties of addition"?
Properties of addition is a Grade 8 Mathematics lesson on ExcelOS.
What will I learn in Properties of addition?
You'll be able to: Identify the commutative, associative, and identity properties of addition when presented with numerical equations; Apply the associative and commutative properties of addition to simplify numerical expressions and solve….
Is "Properties of addition" free to practice?
Yes. You can read the tutorial preview for free, and signing up for a free ExcelOS account unlocks the full tutorial and all practice questions with instant feedback.
How many practice questions are included with Properties of addition?
This lesson includes 25 practice questions across multiple difficulty levels, each with instant feedback and explanations.