Lesson 116 of 500 · Extra Passages

Subtraction to 20 Part 3

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Subtraction to 20 is studied by students all over the world. It is a key part of the curriculum. Teachers explain Subtraction to 20 using examples and activities. With practice, anyone can understand Subtraction to 20 well.

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Question 1

1 of 2

According to the passage, what does studying Subtraction to 20 help develop?