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Mental Addition Worksheet

Speed calculation lesson 5: Running totals · Set 596 · 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 + 85 + 36 + 72 =
  2. 2.25 + 45 + 57 + 20 =
  3. 3.45 + 20 + 28 + 38 =
  4. 4.30 + 21 + 55 + 29 =
  5. 5.18 + 48 + 46 + 64 =
  6. 6.50 + 11 + 82 + 35 =
  7. 7.50 + 47 + 76 + 58 =
  8. 8.75 + 68 + 14 + 79 =
  9. 9.81 + 37 + 52 + 35 =
  10. 10.49 + 26 + 29 + 78 =
  11. 11.61 + 28 + 72 + 86 =
  12. 12.24 + 86 + 50 + 56 =
  13. 13.68 + 85 + 49 + 13 =
  14. 14.41 + 32 + 19 + 82 =
  15. 15.56 + 82 + 14 + 45 =
  16. 16.76 + 84 + 66 + 43 =
  17. 17.80 + 58 + 88 + 72 =
  18. 18.30 + 27 + 62 + 31 =
  19. 19.27 + 52 + 89 + 61 =
  20. 20.35 + 62 + 16 + 54 =
  21. 21.40 + 84 + 55 + 75 =
  22. 22.50 + 40 + 78 + 60 =
  23. 23.39 + 83 + 84 + 59 =
  24. 24.46 + 44 + 83 + 28 =
  25. 25.17 + 29 + 26 + 41 =
  26. 26.29 + 27 + 18 + 88 =
  27. 27.35 + 13 + 21 + 89 =
  28. 28.29 + 56 + 15 + 18 =
  29. 29.11 + 24 + 37 + 60 =
  30. 30.68 + 30 + 23 + 11 =
  31. 31.78 + 54 + 77 + 25 =
  32. 32.28 + 29 + 15 + 13 =
  33. 33.51 + 60 + 82 + 70 =
  34. 34.53 + 82 + 72 + 49 =
  35. 35.53 + 20 + 38 + 68 =
  36. 36.63 + 19 + 25 + 56 =
  37. 37.40 + 48 + 22 + 75 =
  38. 38.40 + 89 + 53 + 38 =
  39. 39.46 + 41 + 76 + 65 =
  40. 40.58 + 49 + 87 + 57 =

Answer key

  1. 236
  2. 147
  3. 131
  4. 135
  5. 176
  6. 178
  7. 231
  8. 236
  9. 205
  10. 182
  11. 247
  12. 216
  13. 215
  14. 174
  15. 197
  16. 269
  17. 298
  18. 150
  19. 229
  20. 167
  21. 254
  22. 228
  23. 265
  24. 201
  25. 113
  26. 162
  27. 158
  28. 118
  29. 132
  30. 132
  31. 234
  32. 85
  33. 263
  34. 256
  35. 179
  36. 163
  37. 185
  38. 220
  39. 228
  40. 251

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