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Mental Addition Worksheet

Speed calculation lesson 5: Running totals · Set 53 · 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. 1.79 + 28 + 36 + 26 =
  2. 2.25 + 39 + 16 + 25 =
  3. 3.66 + 89 + 23 + 74 =
  4. 4.21 + 21 + 64 + 66 =
  5. 5.35 + 82 + 57 + 29 =
  6. 6.51 + 14 + 89 + 35 =
  7. 7.31 + 81 + 86 + 50 =
  8. 8.18 + 18 + 17 + 39 =
  9. 9.78 + 89 + 74 + 56 =
  10. 10.50 + 50 + 25 + 57 =
  11. 11.76 + 87 + 40 + 28 =
  12. 12.89 + 67 + 66 + 11 =
  13. 13.81 + 80 + 41 + 47 =
  14. 14.36 + 82 + 30 + 46 =
  15. 15.47 + 43 + 27 + 77 =
  16. 16.24 + 75 + 28 + 79 =
  17. 17.70 + 50 + 26 + 38 =
  18. 18.34 + 85 + 80 + 85 =
  19. 19.44 + 11 + 26 + 86 =
  20. 20.43 + 57 + 49 + 58 =
  21. 21.34 + 48 + 84 + 63 =
  22. 22.27 + 45 + 65 + 84 =
  23. 23.84 + 68 + 58 + 64 =
  24. 24.48 + 56 + 56 + 52 =
  25. 25.40 + 46 + 87 + 15 =
  26. 26.75 + 75 + 12 + 24 =
  27. 27.45 + 36 + 74 + 64 =
  28. 28.35 + 21 + 17 + 34 =
  29. 29.37 + 35 + 36 + 12 =
  30. 30.71 + 30 + 69 + 26 =
  31. 31.89 + 79 + 64 + 78 =
  32. 32.21 + 35 + 27 + 79 =
  33. 33.17 + 79 + 69 + 11 =
  34. 34.33 + 27 + 51 + 86 =
  35. 35.79 + 38 + 59 + 23 =
  36. 36.50 + 43 + 38 + 52 =
  37. 37.73 + 82 + 75 + 69 =
  38. 38.81 + 75 + 21 + 29 =
  39. 39.73 + 62 + 68 + 66 =
  40. 40.33 + 11 + 40 + 68 =

Answer key

  1. 169
  2. 105
  3. 252
  4. 172
  5. 203
  6. 189
  7. 248
  8. 92
  9. 297
  10. 182
  11. 231
  12. 233
  13. 249
  14. 194
  15. 194
  16. 206
  17. 184
  18. 284
  19. 167
  20. 207
  21. 229
  22. 221
  23. 274
  24. 212
  25. 188
  26. 186
  27. 219
  28. 107
  29. 120
  30. 196
  31. 310
  32. 162
  33. 176
  34. 197
  35. 199
  36. 183
  37. 299
  38. 206
  39. 269
  40. 152

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