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Mental Addition Worksheet

Speed calculation lesson 5: Running totals · Set 131 · 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. 1.46 + 19 + 72 + 16 =
  2. 2.50 + 61 + 21 + 48 =
  3. 3.22 + 66 + 13 + 28 =
  4. 4.89 + 53 + 17 + 38 =
  5. 5.12 + 40 + 45 + 24 =
  6. 6.35 + 58 + 31 + 23 =
  7. 7.55 + 88 + 60 + 38 =
  8. 8.72 + 12 + 53 + 89 =
  9. 9.23 + 45 + 11 + 61 =
  10. 10.62 + 55 + 33 + 13 =
  11. 11.71 + 33 + 62 + 16 =
  12. 12.87 + 28 + 51 + 65 =
  13. 13.73 + 86 + 71 + 64 =
  14. 14.88 + 80 + 24 + 80 =
  15. 15.14 + 35 + 86 + 40 =
  16. 16.58 + 63 + 42 + 88 =
  17. 17.20 + 24 + 77 + 28 =
  18. 18.48 + 65 + 32 + 68 =
  19. 19.12 + 67 + 53 + 20 =
  20. 20.59 + 55 + 41 + 38 =
  21. 21.32 + 45 + 11 + 23 =
  22. 22.61 + 82 + 35 + 47 =
  23. 23.62 + 39 + 29 + 17 =
  24. 24.64 + 22 + 24 + 87 =
  25. 25.56 + 56 + 69 + 73 =
  26. 26.76 + 49 + 81 + 11 =
  27. 27.32 + 64 + 37 + 42 =
  28. 28.23 + 74 + 76 + 13 =
  29. 29.86 + 37 + 64 + 72 =
  30. 30.35 + 67 + 67 + 24 =
  31. 31.33 + 82 + 27 + 67 =
  32. 32.13 + 58 + 37 + 62 =
  33. 33.56 + 60 + 56 + 69 =
  34. 34.52 + 46 + 34 + 69 =
  35. 35.60 + 19 + 77 + 73 =
  36. 36.42 + 14 + 56 + 73 =
  37. 37.34 + 36 + 53 + 88 =
  38. 38.70 + 74 + 47 + 16 =
  39. 39.74 + 69 + 37 + 36 =
  40. 40.45 + 58 + 29 + 31 =

Answer key

  1. 153
  2. 180
  3. 129
  4. 197
  5. 121
  6. 147
  7. 241
  8. 226
  9. 140
  10. 163
  11. 182
  12. 231
  13. 294
  14. 272
  15. 175
  16. 251
  17. 149
  18. 213
  19. 152
  20. 193
  21. 111
  22. 225
  23. 147
  24. 197
  25. 254
  26. 217
  27. 175
  28. 186
  29. 259
  30. 193
  31. 209
  32. 170
  33. 241
  34. 201
  35. 229
  36. 185
  37. 211
  38. 207
  39. 216
  40. 163

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