G2-Lesson 5

Presentation

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Mathematics

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1st - 2nd Grade

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Medium

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CCSS

2.OA.C.3, 1.OA.A.1, 1.OA.B.3

Standards-aligned

Renting Wu

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3 Slides • 7 Questions

G2-Lesson 5

What is 'addends'and 'sum'

When we add, the number we add are called 'addends'. The answer is called the 'sum'

Multiple Choice

What are the addends in this question?

4 + 5 = 9

4 and 5

Multiple Select

What are the addends in this question?

5 + 6 = 11

11 and 5

Multiple Choice

6 + 4 = 10

In this question, 4 and 6 are ?

sum

numbers

addends

digits

Multiple Choice

What is the sum in 6 + 8 = 14

6 and 8

8 and 14

Multiple Choice

What is the sum in 9+ 8 = 17

9 and 8

Multiple Choice

7+ 2 = 9

in this problem, the sum is ?

7 and 2

1 + 2 = 3
2 + 1 = 3

What do you notice about these two problems?
The order of the addends is different, but the sum is the same.
We call this an example of the 'commutative property of addition.'

Multiple Select

Select the examples that shows the 'commutative property of addition'.

1 + 5 = 5 + 1

2 + 2 = 3 + 1

5 + 7 = 7 + 5

7 + 6 = 6 + 7

G2-Lesson 5

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