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Making Landmark or Friendly Numbers

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This resource explores three distinct categories of numbers: Landmark and Friendly Numbers, specifically designed numbers, and computational problems involving addends. Category 1 focuses on numbers that are one away from landmark or friendly numbers, highlighting various combinations. Category 2 delves into addends that are two away from multiples of ten or landmark numbers. Finally, Category 3 presents computational challenges with two- and three-digit addends that deviate from multiples of ten or landmark numbers. This guide is ideal for educators and learners seeking to understand number patterns and their applications.

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Making Landmark or Friendly Numbers

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  1. Making Landmark or Friendly Numbers

  2. Category 1 Designed to be one away from a landmark or friendly number

  3. 19 + 2 19 + 5 19 + 8 19 + 12

  4. 9 + 8 19 + 5 9 + 26 16 + 19

  5. 7 + 19 16 + 29 19 + 18 29 + 33

  6. 39 + 16 28 + 39 59 + 13 23 + 49

  7. 25 + 25 25 + 26 24 + 26 26 + 49

  8. 49 + 8 49 + 23 49 + 37 49 + 51

  9. 46 + 59 44 + 69 58 + 39 76 + 24

  10. 37 + 69 79 + 26 89 + 28 99 + 19

  11. 99 + 5 99 + 15 99 + 26 99 + 51

  12. Category 2 Consists of one addend that is two away from a multiple of ten or a landmark number

  13. 8 + 5 8 + 13 8 + 24 18 + 7

  14. 8 + 4 18 + 6 28 + 17 27 + 28

  15. 28 + 16 25 + 38 23 + 27 28 + 45

  16. 18 + 63 38 + 37 67 + 28 48 + 52

  17. 48 + 6 48 + 17 23 + 48 48 + 47

  18. 58 + 36 24 + 78 88 + 14 68 + 33

  19. 98 + 5 98 + 13 98 + 34 98 + 52

  20. 8 + 4 + 18 18 + 4 + 18 28 + 5 + 27 24 + 3 + 48

  21. 48 + 4 + 48 48 + 49 + 3 98 + 97 + 5 99 + 98 + 97 + 5

  22. Category 3 Consists of computational problems with two- and three-digit addends. The addends are one or more away from a multiple of ten or landmark number.

  23. 99 + 38 98 + 47 98 + 99 99 + 99 + 5

  24. 119 + 26 118 + 17 129 + 16 124 + 26

  25. 36 + 109 49 + 108 119 + 48 126 + 124

  26. 116 + 29 39 + 127 114 + 118 46 + 118

  27. 198 + 7 199 + 13 148 + 27 139 + 43

  28. 128 + 34 119 + 36 56 + 129 126 + 49

  29. 119 + 119 149 + 149 129 + 139 199 + 199

  30. 249 + 22 248 + 49 225 + 49 299 + 26

  31. 999 + 99 998 + 49 997 + 199 199 + 99 + 49

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