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Mental Addition Worksheet

Speed calculation lesson 5: Running totals · Set 292 · 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. 1.53 + 23 + 20 + 64 =
  2. 2.17 + 33 + 76 + 79 =
  3. 3.32 + 83 + 79 + 33 =
  4. 4.64 + 46 + 75 + 71 =
  5. 5.22 + 67 + 20 + 44 =
  6. 6.14 + 13 + 28 + 14 =
  7. 7.38 + 24 + 49 + 37 =
  8. 8.21 + 42 + 38 + 19 =
  9. 9.16 + 55 + 15 + 31 =
  10. 10.48 + 81 + 59 + 25 =
  11. 11.48 + 44 + 74 + 11 =
  12. 12.22 + 52 + 47 + 85 =
  13. 13.43 + 72 + 35 + 51 =
  14. 14.29 + 51 + 47 + 71 =
  15. 15.70 + 87 + 24 + 38 =
  16. 16.85 + 22 + 78 + 31 =
  17. 17.54 + 48 + 89 + 79 =
  18. 18.36 + 33 + 22 + 59 =
  19. 19.30 + 22 + 20 + 65 =
  20. 20.14 + 17 + 79 + 18 =
  21. 21.25 + 87 + 79 + 50 =
  22. 22.71 + 23 + 16 + 65 =
  23. 23.72 + 56 + 45 + 58 =
  24. 24.69 + 74 + 64 + 25 =
  25. 25.39 + 40 + 35 + 36 =
  26. 26.74 + 21 + 82 + 14 =
  27. 27.49 + 83 + 70 + 16 =
  28. 28.79 + 40 + 51 + 74 =
  29. 29.47 + 38 + 51 + 73 =
  30. 30.34 + 35 + 73 + 20 =
  31. 31.72 + 85 + 28 + 79 =
  32. 32.20 + 75 + 73 + 83 =
  33. 33.49 + 60 + 87 + 46 =
  34. 34.16 + 59 + 43 + 46 =
  35. 35.69 + 34 + 13 + 28 =
  36. 36.23 + 22 + 62 + 40 =
  37. 37.29 + 66 + 28 + 28 =
  38. 38.68 + 21 + 37 + 11 =
  39. 39.60 + 52 + 85 + 14 =
  40. 40.65 + 11 + 30 + 62 =

Answer key

  1. 160
  2. 205
  3. 227
  4. 256
  5. 153
  6. 69
  7. 148
  8. 120
  9. 117
  10. 213
  11. 177
  12. 206
  13. 201
  14. 198
  15. 219
  16. 216
  17. 270
  18. 150
  19. 137
  20. 128
  21. 241
  22. 175
  23. 231
  24. 232
  25. 150
  26. 191
  27. 218
  28. 244
  29. 209
  30. 162
  31. 264
  32. 251
  33. 242
  34. 164
  35. 144
  36. 147
  37. 151
  38. 137
  39. 211
  40. 168

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