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Mastering Subtraction by Counting On Technique

Learn how to subtract numbers up to 100 by counting on, with step-by-step instructions and practice exercises. Discover the key concept of taking away to find the difference between two numbers easily.

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Mastering Subtraction by Counting On Technique

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  1. Subtraction by counting on Key Words Subtraction = taking away

  2. Lesson Aim: To know how to subtract numbers to 100 by counting on

  3. How do you solve 99-45 by counting on? • 45 • 99 ?

  4. We count on. Here is how….. Think!

  5. We added 5+40+9= 54 99-45=5445+5=5050+40=9090+9=99 add 5 add 40 add 9 45 50 90 99

  6. Counting on always: starts with the number being taken away ends with the number that has something taken away fromit WE find the DIFFERENCE between the two numbers. If you need more help please ask now…..

  7. Solve these by counting on 78-89= 94-56= 67-53= 88-32=

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