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Mental Addition Worksheet

Speed calculation lesson 5: Running totals · Set 527 · 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. 1.18 + 14 + 16 + 14 =
  2. 2.52 + 46 + 49 + 87 =
  3. 3.35 + 11 + 56 + 61 =
  4. 4.20 + 43 + 60 + 21 =
  5. 5.57 + 69 + 71 + 60 =
  6. 6.81 + 16 + 64 + 77 =
  7. 7.83 + 63 + 26 + 58 =
  8. 8.36 + 55 + 25 + 17 =
  9. 9.36 + 14 + 26 + 19 =
  10. 10.68 + 47 + 20 + 63 =
  11. 11.42 + 47 + 86 + 86 =
  12. 12.57 + 43 + 64 + 32 =
  13. 13.49 + 65 + 73 + 43 =
  14. 14.46 + 46 + 48 + 73 =
  15. 15.22 + 67 + 86 + 44 =
  16. 16.72 + 44 + 67 + 55 =
  17. 17.48 + 74 + 40 + 24 =
  18. 18.84 + 69 + 15 + 20 =
  19. 19.87 + 23 + 65 + 27 =
  20. 20.19 + 48 + 70 + 13 =
  21. 21.74 + 46 + 16 + 29 =
  22. 22.65 + 37 + 51 + 40 =
  23. 23.11 + 49 + 48 + 13 =
  24. 24.37 + 82 + 50 + 86 =
  25. 25.31 + 49 + 56 + 21 =
  26. 26.27 + 68 + 80 + 25 =
  27. 27.57 + 15 + 27 + 40 =
  28. 28.74 + 38 + 71 + 83 =
  29. 29.64 + 55 + 15 + 34 =
  30. 30.58 + 13 + 68 + 75 =
  31. 31.53 + 84 + 39 + 40 =
  32. 32.59 + 19 + 55 + 61 =
  33. 33.77 + 85 + 18 + 66 =
  34. 34.30 + 85 + 40 + 33 =
  35. 35.58 + 36 + 45 + 89 =
  36. 36.48 + 58 + 18 + 52 =
  37. 37.20 + 18 + 58 + 13 =
  38. 38.47 + 60 + 28 + 53 =
  39. 39.51 + 84 + 53 + 43 =
  40. 40.69 + 25 + 89 + 11 =

Answer key

  1. 62
  2. 234
  3. 163
  4. 144
  5. 257
  6. 238
  7. 230
  8. 133
  9. 95
  10. 198
  11. 261
  12. 196
  13. 230
  14. 213
  15. 219
  16. 238
  17. 186
  18. 188
  19. 202
  20. 150
  21. 165
  22. 193
  23. 121
  24. 255
  25. 157
  26. 200
  27. 139
  28. 266
  29. 168
  30. 214
  31. 216
  32. 194
  33. 246
  34. 188
  35. 228
  36. 176
  37. 109
  38. 188
  39. 231
  40. 194

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