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Mental Addition Worksheet

Speed calculation lesson 5: Running totals · Set 692 · 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. 1.41 + 28 + 42 + 25 =
  2. 2.28 + 53 + 56 + 22 =
  3. 3.88 + 71 + 38 + 80 =
  4. 4.82 + 46 + 86 + 45 =
  5. 5.69 + 50 + 56 + 11 =
  6. 6.26 + 72 + 31 + 79 =
  7. 7.77 + 21 + 15 + 48 =
  8. 8.39 + 72 + 65 + 11 =
  9. 9.33 + 48 + 63 + 58 =
  10. 10.84 + 12 + 22 + 89 =
  11. 11.42 + 57 + 68 + 26 =
  12. 12.76 + 76 + 85 + 21 =
  13. 13.33 + 65 + 81 + 50 =
  14. 14.62 + 48 + 33 + 25 =
  15. 15.11 + 43 + 36 + 24 =
  16. 16.52 + 14 + 24 + 83 =
  17. 17.69 + 17 + 56 + 49 =
  18. 18.79 + 56 + 44 + 14 =
  19. 19.13 + 39 + 64 + 89 =
  20. 20.41 + 43 + 29 + 68 =
  21. 21.47 + 76 + 68 + 73 =
  22. 22.68 + 20 + 74 + 71 =
  23. 23.81 + 71 + 77 + 44 =
  24. 24.64 + 28 + 32 + 43 =
  25. 25.12 + 85 + 61 + 54 =
  26. 26.82 + 17 + 48 + 73 =
  27. 27.46 + 43 + 42 + 65 =
  28. 28.45 + 64 + 49 + 21 =
  29. 29.55 + 21 + 23 + 13 =
  30. 30.41 + 18 + 65 + 48 =
  31. 31.74 + 23 + 25 + 21 =
  32. 32.25 + 30 + 48 + 41 =
  33. 33.29 + 63 + 20 + 47 =
  34. 34.72 + 88 + 12 + 79 =
  35. 35.87 + 78 + 60 + 89 =
  36. 36.38 + 17 + 87 + 57 =
  37. 37.76 + 28 + 42 + 17 =
  38. 38.75 + 24 + 30 + 87 =
  39. 39.73 + 39 + 88 + 60 =
  40. 40.21 + 33 + 25 + 28 =

Answer key

  1. 136
  2. 159
  3. 277
  4. 259
  5. 186
  6. 208
  7. 161
  8. 187
  9. 202
  10. 207
  11. 193
  12. 258
  13. 229
  14. 168
  15. 114
  16. 173
  17. 191
  18. 193
  19. 205
  20. 181
  21. 264
  22. 233
  23. 273
  24. 167
  25. 212
  26. 220
  27. 196
  28. 179
  29. 112
  30. 172
  31. 143
  32. 144
  33. 159
  34. 251
  35. 314
  36. 199
  37. 163
  38. 216
  39. 260
  40. 107

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