1.OA.B.3
Apply properties of operations as strategies to add and subtract. Examples: If 8 + 3 = 11 is known, then 3 + 8 = 11 is also known. (Commutative property of addition.) To add 2 + 6 + 4, the second two numbers can be added to make a ten, so 2 + 6 + 4 = 2 + 10 = 12. (Associative property of addition.)
23 Lesson(s)
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When we add 3 addends we can look for a friendly combination to make our work easier
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My students are learning addition strategies. I want my little ones to learn they numbers can change order and be added and the result will be the same. It's the Commutative Property!
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It's all in the family! In this lesson, students will begin to identify and understand the relationship between addition and subtraction sentences.
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Using the theme of a very YUMMY Thanksgiving meal, students will plan their own meal and figure out the cost of it.
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Students think deeply about how to make 9 using different combinations of red and blue crayons. This builds number sense and sets them up for later math fact fluency!
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Students "sweat" in this difficult task where they work to find all of the combinations for 7 and 8.
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It's all in the family! In this lesson, students will build fact family "houses" by using 3 numbers and writing the related addition and subtraction sentences.
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Your students will play a game where they combine two single digit numbers and then record that total in terms of how it relates to ten.
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Early in the year we sang Apples and Bananas and solved for combinations of 7 and 8. Now we are upping the ante and moving in numbers beyond 10. This lesson challenges the students to find all of the possible combinations for the number 12.
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In this lesson the children begin to make the connection that two addition sentences are related through the commutative property.
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Students explore the Commutative Property and learn why you can "flip flop" the addends and still get the same answer!
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My students have worked on joining 3 addends using drawings, objects, and equations. This lesson will supply concentrated practice on solving 3 addend equations with sums less than or equal to 20.
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Which one of these is not like the other?! Students apply their understanding of 3 addend equations to decide which number sentence in a group of 4 is false. First person to find the false number sentence wins!
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Introduce students to the concept of "simplifying" as they find the friendly number sentences that help them solve 3 addend number sentences!
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