Addition Strategies and Number Combinations

The video tutorial introduces an addition strategy focused on making numbers into multiples of 10. It demonstrates two methods: expanding numbers to simplify addition and an alternative method without expansion. The example problem involves adding 24, 32, 16, and 18 by identifying pairs that sum to 10, making the addition process more straightforward. The tutorial emphasizes understanding the concept of making tens to facilitate easier calculations.

What is the main goal of the addition strategy discussed in the video?

• To make numbers into multiples of 5

• To make numbers into multiples of 3

• To make numbers into multiples of 10

• To make numbers into multiples of 2

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CCSS.3.NBT.A.2

CCSS.2.NBT.B.7

Which numbers are being added in the example problem?

• 15, 25, 35, 45

• 12, 22, 14, 28

• 20, 30, 10, 40

• 24, 32, 16, 18

Tags

CCSS.5.NBT.B.5

What is the first step in the strategy shown in the video?

• Subtracting numbers

• Multiplying numbers

• Expanding numbers

• Dividing numbers

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CCSS.1.OA.A.1

Which two numbers are combined to make the first 10 in the expanded method?

• 2 and 8

• 6 and 4

• 16 and 18

• 24 and 32

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CCSS.1.NBT.C.5

What is the sum of 20 plus 30?

• 40

• 50

• 60

• 70

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CCSS.2.NBT.B.5

What is the purpose of expanding numbers in this strategy?

• To multiply them by ten

• To make them easier to subtract

• To identify pairs that sum to ten

• To convert them into fractions

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CCSS.1.OA.A.1

In the alternative method, which numbers are identified to make 10?

• 7, 8, and 9

• 1, 3, and 5

• 5, 6, and 7

• 2, 4, and 6

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CCSS.2.OA.A.1

What is the total sum of the numbers in the problem?

• 80

• 110

• 90

• 100

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CCSS.2.NBT.B.6

What is the sum of 40 plus 50?

• 80

• 110

• 100

• 90

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CCSS.5.NBT.B.7

What is the final step in the addition strategy shown?

• Subtracting the pairs

• Multiplying the pairs

• Adding the pairs

• Dividing the pairs

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CCSS.5.NBT.B.7