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Mental Addition Worksheet

Speed calculation lesson 5: Running totals · Set 72 · 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. 1.78 + 45 + 56 + 79 =
  2. 2.60 + 48 + 65 + 68 =
  3. 3.29 + 88 + 86 + 89 =
  4. 4.52 + 57 + 43 + 42 =
  5. 5.42 + 48 + 11 + 37 =
  6. 6.82 + 29 + 87 + 42 =
  7. 7.62 + 32 + 64 + 19 =
  8. 8.76 + 31 + 47 + 43 =
  9. 9.77 + 63 + 67 + 66 =
  10. 10.54 + 14 + 22 + 15 =
  11. 11.53 + 42 + 63 + 80 =
  12. 12.79 + 72 + 72 + 82 =
  13. 13.17 + 23 + 62 + 20 =
  14. 14.81 + 16 + 76 + 87 =
  15. 15.24 + 24 + 62 + 80 =
  16. 16.12 + 40 + 66 + 71 =
  17. 17.62 + 48 + 72 + 41 =
  18. 18.82 + 60 + 23 + 45 =
  19. 19.85 + 88 + 74 + 39 =
  20. 20.64 + 87 + 65 + 24 =
  21. 21.41 + 29 + 13 + 13 =
  22. 22.50 + 34 + 29 + 22 =
  23. 23.60 + 46 + 66 + 54 =
  24. 24.74 + 49 + 30 + 38 =
  25. 25.70 + 82 + 81 + 76 =
  26. 26.64 + 38 + 49 + 13 =
  27. 27.36 + 29 + 33 + 25 =
  28. 28.46 + 58 + 86 + 69 =
  29. 29.45 + 20 + 14 + 89 =
  30. 30.81 + 47 + 20 + 55 =
  31. 31.60 + 25 + 65 + 13 =
  32. 32.40 + 34 + 64 + 47 =
  33. 33.88 + 24 + 31 + 79 =
  34. 34.22 + 27 + 36 + 76 =
  35. 35.29 + 81 + 47 + 15 =
  36. 36.84 + 66 + 55 + 65 =
  37. 37.30 + 36 + 23 + 50 =
  38. 38.31 + 22 + 27 + 40 =
  39. 39.81 + 35 + 21 + 32 =
  40. 40.40 + 15 + 67 + 40 =

Answer key

  1. 258
  2. 241
  3. 292
  4. 194
  5. 138
  6. 240
  7. 177
  8. 197
  9. 273
  10. 105
  11. 238
  12. 305
  13. 122
  14. 260
  15. 190
  16. 189
  17. 223
  18. 210
  19. 286
  20. 240
  21. 96
  22. 135
  23. 226
  24. 191
  25. 309
  26. 164
  27. 123
  28. 259
  29. 168
  30. 203
  31. 163
  32. 185
  33. 222
  34. 161
  35. 172
  36. 270
  37. 139
  38. 120
  39. 169
  40. 162

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