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Mastering Mental Calculations: Rapid Recall of Number Bonds and Quick Addition/Subtraction

This educational resource focuses on enhancing mental calculation skills with an emphasis on quickly recalling number bonds up to 20. Students will learn to add or subtract 10 and 100 from any number in their head, which fosters number sense and computational fluency. The lesson includes practice problems and encourages rapid mental math strategies, ensuring students can confidently tackle addition and subtraction with larger numbers. Ideal for primary students aiming to improve their mental arithmetic and calculation speed.

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Mastering Mental Calculations: Rapid Recall of Number Bonds and Quick Addition/Subtraction

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Presentation Transcript

  1. Mental Calculations + and -

  2. Mental Learning Objective I can rapidly recall my number bonds up to 20

  3. Mental Learning Objective I can rapidly recall my number bonds up to 20

  4. Main Learning Objective I am able to add or subtract 10 or 100 to any number in my head.

  5. Able to add or subtract 10’s quickly. What is 45 + 10? T U T U T U

  6. Able to add or subtract 10’s quickly. What is 55 + 40? T U T U T U

  7. Able to add or subtract 10’s quickly. What is 55 - 40? T U T U T U

  8. Able to add or subtract 10’s quickly. What is 75 + 30? T U T U T U

  9. Able to add or subtract 100’s quickly. What is 75 + 100? HTU HTU HTU

  10. Able to add or subtract 100’s quickly. What is 175 + 200? HTU HTU HTU

  11. Able to add or subtract 100’s quickly. What is 275 – 200? HTU HTU HTU

  12. Able to add or subtract 100’s quickly. What is 235 + 200? HTU HTU HTU

  13. Main Learning Objective I am able to add 10 or 100 to a number in my head.

  14. Plenary • In this lesson, I practised my number bonds to 20. • I learnt how to add and subtract 10 and 100 from any number in my head.

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