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Mental Addition Worksheet

Speed calculation lesson 5: Running totals · Set 749 · 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. 1.45 + 78 + 48 + 46 =
  2. 2.46 + 73 + 32 + 64 =
  3. 3.19 + 81 + 46 + 33 =
  4. 4.38 + 20 + 61 + 75 =
  5. 5.20 + 53 + 18 + 21 =
  6. 6.13 + 19 + 86 + 30 =
  7. 7.59 + 67 + 64 + 58 =
  8. 8.68 + 88 + 34 + 54 =
  9. 9.50 + 30 + 43 + 79 =
  10. 10.28 + 40 + 40 + 28 =
  11. 11.30 + 82 + 82 + 68 =
  12. 12.23 + 78 + 63 + 25 =
  13. 13.79 + 27 + 83 + 82 =
  14. 14.79 + 36 + 61 + 51 =
  15. 15.89 + 36 + 77 + 30 =
  16. 16.41 + 25 + 26 + 59 =
  17. 17.23 + 73 + 31 + 59 =
  18. 18.45 + 31 + 80 + 21 =
  19. 19.26 + 39 + 37 + 23 =
  20. 20.57 + 83 + 16 + 74 =
  21. 21.20 + 74 + 75 + 15 =
  22. 22.74 + 87 + 69 + 79 =
  23. 23.32 + 43 + 88 + 82 =
  24. 24.17 + 44 + 74 + 40 =
  25. 25.78 + 39 + 69 + 46 =
  26. 26.46 + 83 + 75 + 61 =
  27. 27.78 + 28 + 18 + 76 =
  28. 28.61 + 25 + 38 + 84 =
  29. 29.58 + 20 + 66 + 15 =
  30. 30.30 + 48 + 22 + 81 =
  31. 31.61 + 11 + 26 + 24 =
  32. 32.24 + 66 + 23 + 40 =
  33. 33.32 + 72 + 21 + 26 =
  34. 34.34 + 70 + 23 + 88 =
  35. 35.77 + 52 + 47 + 70 =
  36. 36.62 + 51 + 48 + 44 =
  37. 37.25 + 63 + 63 + 82 =
  38. 38.61 + 29 + 42 + 86 =
  39. 39.31 + 23 + 31 + 54 =
  40. 40.49 + 23 + 52 + 15 =

Answer key

  1. 217
  2. 215
  3. 179
  4. 194
  5. 112
  6. 148
  7. 248
  8. 244
  9. 202
  10. 136
  11. 262
  12. 189
  13. 271
  14. 227
  15. 232
  16. 151
  17. 186
  18. 177
  19. 125
  20. 230
  21. 184
  22. 309
  23. 245
  24. 175
  25. 232
  26. 265
  27. 200
  28. 208
  29. 159
  30. 181
  31. 122
  32. 153
  33. 151
  34. 215
  35. 246
  36. 205
  37. 233
  38. 218
  39. 139
  40. 139

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