Studying Targets:

• I can add and subtract inside 10 simply.
• I can add and subtract by making 10. (e.g. 7 + 3 = 10, 10 – 6 = 4)

The next diagrams present the Make Ten Subtraction Technique. Scroll down the web page for extra examples and options. Psychological Math Methods: Break Down To 10

Tips on how to use psychological methods to subtract inside 20 utilizing the “break all the way down to 10” technique?

This is among the methods recommended within the Widespread Core State Requirements for Arithmetic, 1.OA.6 and a couple of.OA.2.

With follow, this technique might help college students achieve fluency when subtracting inside 20. Finally college students will memorize these information, which is anticipated by the top of grade 2.

Instance: 14 – 9 = 14 – 4 – 5 = 10 – 5 = 5 15 – 7 = 15 – 5 – 2 = 10 – 2 = 8 17 – 8 = 17 – 7 – 1 = 10 – 1 = 9

• Present Video Lesson

Make 10 Subtraction Technique

Instance: 11 – 6 = 11 – 1 – 5 = 10 – 5 = 5 13 – 9 = 13 – 3 – 6 = 10 – 6 = 4 17 – 8 = 17 – 7 – 1 = 10 – 1 = 9 14 – 7 = 14 – 4 – 3 = 10 – 3 = 7

• Present Video Lesson

Subtraction With The Make A Ten Technique

Instance: 12 – 9 = 12 – 2 – 7 = 10 – 7 = 3

• Present Video Lesson

Utilizing Ten: a Psychological Math Subtraction Technique

Utilizing Ten is a psychological math technique that includes altering a quantity to 10 after which adjusting the reply. As a result of “10” is mostly a better quantity to work with, this simplifies the equation making it simpler to unravel.

Instance: 13 – 8 = 10 – 8 + 3 = 5

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