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Mental Addition Worksheet

Speed calculation lesson 5: Running totals · Set 690 · 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. 1.21 + 53 + 88 + 67 =
  2. 2.46 + 82 + 49 + 77 =
  3. 3.82 + 75 + 13 + 88 =
  4. 4.70 + 39 + 64 + 89 =
  5. 5.58 + 89 + 13 + 13 =
  6. 6.73 + 24 + 27 + 36 =
  7. 7.25 + 51 + 56 + 52 =
  8. 8.21 + 64 + 12 + 14 =
  9. 9.11 + 73 + 35 + 39 =
  10. 10.15 + 39 + 51 + 63 =
  11. 11.48 + 57 + 22 + 85 =
  12. 12.36 + 82 + 79 + 44 =
  13. 13.47 + 42 + 51 + 81 =
  14. 14.46 + 48 + 76 + 75 =
  15. 15.84 + 39 + 48 + 79 =
  16. 16.89 + 47 + 74 + 43 =
  17. 17.19 + 87 + 21 + 89 =
  18. 18.87 + 70 + 86 + 53 =
  19. 19.81 + 79 + 46 + 54 =
  20. 20.41 + 36 + 60 + 52 =
  21. 21.71 + 74 + 16 + 49 =
  22. 22.48 + 71 + 12 + 28 =
  23. 23.74 + 27 + 56 + 78 =
  24. 24.66 + 75 + 86 + 36 =
  25. 25.26 + 62 + 19 + 50 =
  26. 26.80 + 50 + 23 + 12 =
  27. 27.30 + 43 + 13 + 12 =
  28. 28.30 + 64 + 35 + 35 =
  29. 29.44 + 79 + 11 + 85 =
  30. 30.23 + 33 + 59 + 38 =
  31. 31.85 + 74 + 58 + 81 =
  32. 32.83 + 25 + 53 + 74 =
  33. 33.47 + 60 + 74 + 50 =
  34. 34.12 + 52 + 73 + 68 =
  35. 35.31 + 28 + 20 + 42 =
  36. 36.86 + 57 + 48 + 86 =
  37. 37.21 + 29 + 88 + 56 =
  38. 38.51 + 76 + 66 + 31 =
  39. 39.16 + 80 + 17 + 50 =
  40. 40.59 + 13 + 63 + 37 =

Answer key

  1. 229
  2. 254
  3. 258
  4. 262
  5. 173
  6. 160
  7. 184
  8. 111
  9. 158
  10. 168
  11. 212
  12. 241
  13. 221
  14. 245
  15. 250
  16. 253
  17. 216
  18. 296
  19. 260
  20. 189
  21. 210
  22. 159
  23. 235
  24. 263
  25. 157
  26. 165
  27. 98
  28. 164
  29. 219
  30. 153
  31. 298
  32. 235
  33. 231
  34. 205
  35. 121
  36. 277
  37. 194
  38. 224
  39. 163
  40. 172

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