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Mental Addition Worksheet

Speed calculation lesson 5: Running totals · Set 86 · 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. 1.23 + 74 + 50 + 63 =
  2. 2.61 + 45 + 28 + 14 =
  3. 3.47 + 70 + 32 + 20 =
  4. 4.13 + 43 + 32 + 55 =
  5. 5.23 + 30 + 31 + 71 =
  6. 6.18 + 73 + 14 + 41 =
  7. 7.31 + 88 + 19 + 79 =
  8. 8.13 + 29 + 71 + 32 =
  9. 9.13 + 14 + 53 + 38 =
  10. 10.38 + 23 + 47 + 72 =
  11. 11.65 + 18 + 75 + 23 =
  12. 12.14 + 24 + 83 + 50 =
  13. 13.12 + 22 + 28 + 84 =
  14. 14.70 + 66 + 43 + 23 =
  15. 15.67 + 82 + 27 + 70 =
  16. 16.43 + 26 + 81 + 67 =
  17. 17.24 + 35 + 23 + 51 =
  18. 18.70 + 21 + 82 + 38 =
  19. 19.48 + 43 + 33 + 23 =
  20. 20.84 + 82 + 65 + 64 =
  21. 21.43 + 43 + 20 + 87 =
  22. 22.27 + 19 + 63 + 32 =
  23. 23.61 + 31 + 40 + 69 =
  24. 24.34 + 32 + 44 + 12 =
  25. 25.68 + 18 + 25 + 22 =
  26. 26.20 + 33 + 89 + 22 =
  27. 27.66 + 51 + 29 + 85 =
  28. 28.43 + 78 + 74 + 47 =
  29. 29.11 + 25 + 43 + 13 =
  30. 30.36 + 43 + 87 + 89 =
  31. 31.23 + 38 + 41 + 67 =
  32. 32.66 + 22 + 44 + 74 =
  33. 33.63 + 47 + 38 + 70 =
  34. 34.26 + 26 + 83 + 53 =
  35. 35.45 + 21 + 27 + 23 =
  36. 36.62 + 71 + 31 + 65 =
  37. 37.31 + 27 + 45 + 70 =
  38. 38.53 + 16 + 66 + 55 =
  39. 39.39 + 83 + 89 + 59 =
  40. 40.43 + 74 + 33 + 74 =

Answer key

  1. 210
  2. 148
  3. 169
  4. 143
  5. 155
  6. 146
  7. 217
  8. 145
  9. 118
  10. 180
  11. 181
  12. 171
  13. 146
  14. 202
  15. 246
  16. 217
  17. 133
  18. 211
  19. 147
  20. 295
  21. 193
  22. 141
  23. 201
  24. 122
  25. 133
  26. 164
  27. 231
  28. 242
  29. 92
  30. 255
  31. 169
  32. 206
  33. 218
  34. 188
  35. 116
  36. 229
  37. 173
  38. 190
  39. 270
  40. 224

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