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Efficient Number Addition Strategies for Various Number Categories

Learn how to decompose numbers and associate them to add efficiently in chunks. Practice adding multiples of tens while keeping numbers whole, then breaking down the ones into friendly combinations. Explore adding multiples of tens and one hundred while maintaining a whole number.

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Efficient Number Addition Strategies for Various Number Categories

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  1. Adding Up in ChunksDecompose and associate number to add efficiently.

  2. Category 1

  3. 16 + 10 16 + 20 16 + 40 16 + 42

  4. 26 + 10 26 + 30 26 + 50 26 + 53

  5. 24 + 10 24 + 30 24 + 50 24 + 55

  6. 35 + 10 35 + 20 35 + 40 35 + 42

  7. 32 + 10 32 + 30 32 + 50 32 + 55

  8. 44 + 10 44 + 20 44 + 30 44 + 35

  9. 46 + 20 46 + 30 46 + 50 46 + 53

  10. 57 + 10 57 + 20 57 + 30 57 + 33

  11. 53 + 20 53 + 25 53 + 40 53 + 42

  12. Category 2 Adding multiples of tens while keeping on number whole and then breaking apart the ones into friendly combinations. Example: 28 + 24 could be “chunked” as 28 + 20 = 48; the 4 could be broken into 2 + 2 so that 48 + 2 = 50; 50 + 2 = 52

  13. 18 + 10 18 + 13 18 + 20 18 + 23

  14. 16 + 20 16 + 25 16 + 30 16 + 36

  15. 17 + 10 17 + 14 17 + 30 17 + 35

  16. 29 + 10 29 + 15 29 + 20 29 + 24

  17. 38 + 20 38 + 26 38 + 30 38 + 33

  18. 45 + 30 45 + 38 45 + 40 45 + 46

  19. 57 + 10 57 + 14 57 + 30 57 + 36

  20. 65 + 30 65 + 36 65 + 50 65 + 57

  21. 73 + 30 73 + 38 73 + 50 73 + 58

  22. Category 3 Adding multiples of tens and one hundred while keeping one number whole.

  23. 56 + 40 56 + 50 156 + 40 156 + 43

  24. 256 + 100 256 + 300 256 + 340 256 + 342

  25. 117 + 200 117 + 400 117 + 420 117 + 426

  26. 37 + 40 37 + 46 237 + 40 237 + 48

  27. 25 + 60 25 + 66 125 + 60 125 + 68

  28. 47 + 80 47 + 84 247 + 70 247 + 74

  29. 345 + 200 345 + 400 345 + 450 345 + 457

  30. 134 + 100 134 + 300 134 + 380 134 + 387

  31. 218 + 200 218 + 400 218 + 450 218 + 456

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