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Mental Addition Worksheet

Speed calculation lesson 5: Running totals · Set 598 · 40 questions
TalentJR

The fast method (Keep a running total): Start with the first number. Add the tens of the next number, then its ones. Keep going until the list ends — only one total in your head at a time.

NameDateTime takenScore ___ / 40
  1. 1.43 + 49 + 49 + 48 =
  2. 2.30 + 66 + 41 + 32 =
  3. 3.36 + 30 + 86 + 67 =
  4. 4.46 + 38 + 28 + 85 =
  5. 5.41 + 64 + 68 + 50 =
  6. 6.20 + 33 + 18 + 76 =
  7. 7.71 + 58 + 27 + 15 =
  8. 8.38 + 17 + 35 + 19 =
  9. 9.17 + 73 + 24 + 19 =
  10. 10.84 + 16 + 86 + 49 =
  11. 11.52 + 61 + 75 + 29 =
  12. 12.61 + 57 + 29 + 27 =
  13. 13.77 + 51 + 74 + 28 =
  14. 14.42 + 56 + 49 + 47 =
  15. 15.14 + 15 + 27 + 21 =
  16. 16.78 + 49 + 77 + 65 =
  17. 17.50 + 32 + 39 + 36 =
  18. 18.60 + 51 + 27 + 75 =
  19. 19.33 + 11 + 83 + 63 =
  20. 20.26 + 58 + 66 + 22 =
  21. 21.29 + 38 + 11 + 49 =
  22. 22.18 + 58 + 81 + 85 =
  23. 23.30 + 20 + 18 + 47 =
  24. 24.16 + 79 + 79 + 45 =
  25. 25.40 + 72 + 43 + 65 =
  26. 26.67 + 82 + 35 + 20 =
  27. 27.72 + 46 + 47 + 24 =
  28. 28.44 + 64 + 37 + 74 =
  29. 29.83 + 13 + 28 + 51 =
  30. 30.69 + 65 + 19 + 59 =
  31. 31.21 + 21 + 69 + 84 =
  32. 32.79 + 59 + 86 + 37 =
  33. 33.57 + 44 + 16 + 52 =
  34. 34.56 + 20 + 76 + 88 =
  35. 35.68 + 60 + 54 + 74 =
  36. 36.38 + 54 + 36 + 26 =
  37. 37.78 + 63 + 39 + 36 =
  38. 38.51 + 34 + 56 + 72 =
  39. 39.83 + 28 + 84 + 84 =
  40. 40.12 + 16 + 35 + 69 =

Answer key

  1. 189
  2. 169
  3. 219
  4. 197
  5. 223
  6. 147
  7. 171
  8. 109
  9. 133
  10. 235
  11. 217
  12. 174
  13. 230
  14. 194
  15. 77
  16. 269
  17. 157
  18. 213
  19. 190
  20. 172
  21. 127
  22. 242
  23. 115
  24. 219
  25. 220
  26. 204
  27. 189
  28. 219
  29. 175
  30. 212
  31. 195
  32. 261
  33. 169
  34. 240
  35. 256
  36. 154
  37. 216
  38. 213
  39. 279
  40. 132

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