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Mastering Doubles: Strengthen Your Mental Math Skills

Explore the world of doubles in mental math with this comprehensive guide designed to help you enhance your calculation abilities through practice and repetition. This resource covers doubling numbers up to two- and three-digits, providing exercises and tips to boost your mathematical proficiency. Whether you're a student looking to improve your arithmetic skills or an adult aiming to sharpen your mental math prowess, this book is an invaluable tool for mastering the art of doubling numbers.

noelle-bell
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Mastering Doubles: Strengthen Your Mental Math Skills

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  1. Doubles/Near Doubles Insert Subtitle Here

  2. Category 1 Doubles up to twenty.

  3. 5 + 5 5 + 6 5 + 7 5 + 8

  4. 6 + 6 5 + 6 6 + 7 6 + 8

  5. 7 + 7 6 + 7 7 + 8 7 + 9

  6. 8 + 8 8 + 7 8 + 9 8 + 6

  7. 9 + 9 8 + 9 8 + 8 8 + 7

  8. 15 + 15 15 + 16 17 + 15 15 + 18

  9. 16 + 16 17 + 17 17 + 18 16 + 17

  10. 18 + 18 18 + 19 18 + 17 19 + 19

  11. 20 + 20 19 + 19 18 + 18 19 + 18

  12. Category 2 Doubles with two-digit numbers.

  13. 20 + 20 19 + 19 19 + 18 19 + 17

  14. 25 + 25 24 + 25 25 + 26 26 + 27

  15. 25 + 25 25 + 28 24 + 27 24 + 28

  16. 30 + 30 29 + 29 29 + 28 28 + 27

  17. 35 + 35 35 + 36 34 + 35 36 + 37

  18. 40 + 40 39 + 39 39 + 38 38 + 37

  19. 45 + 45 45 + 45 46 + 46 45 + 47

  20. 50 + 50 49 + 49 48 + 49 49 + 52

  21. 100 + 100 99 + 99 99 + 98 99 + 97

  22. Category 2 Doubles with two- and three- digit numbers.

  23. 100 + 100 99 + 99 98 + 98 97 + 99

  24. 125 + 125 149 + 149 148 + 149 148 + 148

  25. 150 + 150 149 + 149 148 + 149 148 + 148

  26. 200 + 200 199 + 199 198 + 199 198 + 198

  27. 250 + 250 249 + 249 249 + 248 248 + 248

  28. 300 + 300 299 + 299 298 + 299 298 + 297

  29. 400 + 400 399 + 399 398 + 399 398 + 398

  30. 500 + 500 499 + 499 498 + 499 498 + 497

  31. 1,000 + 1,000 999 + 999 998 + 999 998 + 998

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