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Mental Addition Worksheet

Speed calculation lesson 5: Running totals · Set 137 · 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. 1.64 + 71 + 55 + 86 =
  2. 2.69 + 24 + 46 + 65 =
  3. 3.34 + 42 + 44 + 31 =
  4. 4.32 + 71 + 20 + 75 =
  5. 5.70 + 56 + 81 + 54 =
  6. 6.27 + 41 + 12 + 61 =
  7. 7.79 + 59 + 79 + 67 =
  8. 8.18 + 73 + 53 + 55 =
  9. 9.46 + 36 + 17 + 78 =
  10. 10.82 + 82 + 79 + 40 =
  11. 11.84 + 38 + 45 + 17 =
  12. 12.38 + 79 + 75 + 46 =
  13. 13.83 + 35 + 67 + 60 =
  14. 14.54 + 73 + 27 + 77 =
  15. 15.23 + 69 + 72 + 73 =
  16. 16.59 + 45 + 77 + 76 =
  17. 17.88 + 71 + 25 + 51 =
  18. 18.80 + 52 + 86 + 56 =
  19. 19.66 + 23 + 24 + 21 =
  20. 20.41 + 15 + 29 + 86 =
  21. 21.54 + 76 + 78 + 85 =
  22. 22.60 + 74 + 32 + 63 =
  23. 23.89 + 14 + 62 + 33 =
  24. 24.42 + 70 + 58 + 51 =
  25. 25.74 + 53 + 50 + 70 =
  26. 26.54 + 23 + 79 + 41 =
  27. 27.41 + 57 + 18 + 56 =
  28. 28.79 + 38 + 27 + 51 =
  29. 29.54 + 66 + 65 + 14 =
  30. 30.70 + 47 + 16 + 25 =
  31. 31.79 + 40 + 70 + 54 =
  32. 32.15 + 55 + 48 + 84 =
  33. 33.36 + 72 + 57 + 60 =
  34. 34.52 + 33 + 11 + 38 =
  35. 35.85 + 67 + 29 + 32 =
  36. 36.42 + 38 + 29 + 19 =
  37. 37.15 + 39 + 14 + 69 =
  38. 38.41 + 63 + 30 + 59 =
  39. 39.43 + 78 + 31 + 64 =
  40. 40.75 + 78 + 86 + 53 =

Answer key

  1. 276
  2. 204
  3. 151
  4. 198
  5. 261
  6. 141
  7. 284
  8. 199
  9. 177
  10. 283
  11. 184
  12. 238
  13. 245
  14. 231
  15. 237
  16. 257
  17. 235
  18. 274
  19. 134
  20. 171
  21. 293
  22. 229
  23. 198
  24. 221
  25. 247
  26. 197
  27. 172
  28. 195
  29. 199
  30. 158
  31. 243
  32. 202
  33. 225
  34. 134
  35. 213
  36. 128
  37. 137
  38. 193
  39. 216
  40. 292

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