Addition Strategies for 3rd Graders

The video tutorial introduces various strategies for addition, including the standard algorithm, base 10 blocks, expanded form, and number line methods. Each method is explained with examples, demonstrating how to add numbers using different techniques. The tutorial emphasizes understanding multiple ways to perform addition, enhancing students' mathematical skills and flexibility.

What is the purpose of learning new addition strategies?

• To add new strategies to our existing knowledge

• To make addition more difficult

• To confuse students

• To replace old addition methods

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CCSS.2.NBT.B.7

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In the standard algorithm, where do we start adding the numbers?

• From the leftmost digit

• At the top number

• From the rightmost digit

• In the middle of the number

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CCSS.2.NBT.B.7

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What is the sum of 345 and 287 using the standard algorithm?

• 622

• 632

• 642

• 652

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CCSS.2.NBT.B.7

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What represents the 'ones' in base 10 blocks?

• Boxes

• Arrows

• Dots

• Lines

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How do we represent hundreds in base 10 blocks?

• With boxes

• With lines

• With arrows

• With dots

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CCSS.2.OA.A.1

How many hundreds are combined in the base 10 blocks example?

• Three

• Four

• Five

• Six

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CCSS.2.NBT.A.1B

What is the first step in addition using expanded form?

• Regroup the tens

• Add the ones

• Expand the numbers

• Combine the hundreds

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CCSS.2.NBT.B.7

What property of addition is used in the expanded form example?

• Commutative property

• Associative property

• Identity property

• Distributive property

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CCSS.1.OA.B.3

What is an open number line?

• A number line with no numbers

• A number line that starts with zero

• A number line that ends with zero

• A number line that can start at any number

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CCSS.2.NBT.B.7

How is the number 287 added to 345 on the open number line?

• By adding 287 in one step

• By multiplying 287 and 345

• By breaking 287 into smaller parts and adding sequentially

• By subtracting 287 from 345

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