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Mental Addition Worksheet

Speed calculation lesson 5: Running totals · Set 101 · 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. 1.30 + 85 + 58 + 85 =
  2. 2.58 + 17 + 80 + 13 =
  3. 3.49 + 32 + 18 + 82 =
  4. 4.72 + 14 + 86 + 54 =
  5. 5.61 + 56 + 64 + 35 =
  6. 6.32 + 16 + 50 + 69 =
  7. 7.28 + 76 + 62 + 37 =
  8. 8.82 + 48 + 65 + 20 =
  9. 9.14 + 37 + 37 + 14 =
  10. 10.32 + 55 + 64 + 86 =
  11. 11.48 + 48 + 40 + 52 =
  12. 12.64 + 67 + 56 + 57 =
  13. 13.23 + 76 + 63 + 23 =
  14. 14.26 + 12 + 75 + 26 =
  15. 15.15 + 42 + 22 + 59 =
  16. 16.41 + 22 + 39 + 28 =
  17. 17.48 + 23 + 53 + 14 =
  18. 18.59 + 38 + 52 + 34 =
  19. 19.84 + 57 + 45 + 16 =
  20. 20.67 + 23 + 56 + 51 =
  21. 21.73 + 23 + 48 + 40 =
  22. 22.34 + 77 + 85 + 21 =
  23. 23.88 + 44 + 33 + 29 =
  24. 24.79 + 74 + 76 + 11 =
  25. 25.59 + 31 + 35 + 22 =
  26. 26.80 + 38 + 23 + 51 =
  27. 27.71 + 22 + 41 + 49 =
  28. 28.47 + 42 + 66 + 69 =
  29. 29.76 + 61 + 77 + 22 =
  30. 30.66 + 88 + 23 + 61 =
  31. 31.25 + 64 + 42 + 43 =
  32. 32.75 + 42 + 83 + 86 =
  33. 33.65 + 26 + 34 + 40 =
  34. 34.70 + 57 + 85 + 77 =
  35. 35.15 + 28 + 64 + 50 =
  36. 36.59 + 17 + 19 + 43 =
  37. 37.16 + 84 + 65 + 60 =
  38. 38.35 + 13 + 54 + 86 =
  39. 39.62 + 50 + 59 + 29 =
  40. 40.53 + 42 + 80 + 63 =

Answer key

  1. 258
  2. 168
  3. 181
  4. 226
  5. 216
  6. 167
  7. 203
  8. 215
  9. 102
  10. 237
  11. 188
  12. 244
  13. 185
  14. 139
  15. 138
  16. 130
  17. 138
  18. 183
  19. 202
  20. 197
  21. 184
  22. 217
  23. 194
  24. 240
  25. 147
  26. 192
  27. 183
  28. 224
  29. 236
  30. 238
  31. 174
  32. 286
  33. 165
  34. 289
  35. 157
  36. 138
  37. 225
  38. 188
  39. 200
  40. 238

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