Zim had 19 marbles. He gave 6 marbles to his friend Lilly. How many do I have left?

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Presentation transcript:

Zim had 19 marbles. He gave 6 marbles to his friend Lilly. How many do I have left?

In this lesson you will learn to subtract by counting up to a ten.

Let’s Review = = 10 How many ways can you make 10 ? Tens are friendly numbers that help us add and subtract = 20

A Common Misunderstanding Thinking that numbers can be subtracted in any order. 7 – 3 = = = 3

Core Lesson Counting back from a friendly number makes subtracting easier = ? = 4 -1

Core Lesson =? = 14 We can use any 10 to make subtracting easier. 10, 20, 30…

Zim had 19 marbles. He gave 6 marbles to his friend Lilly. How many marbles do I have left? = = ? = =13 I have 13 marbles left!

In this lesson you have learned to subtract by counting up to a ten.