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Mental Addition Worksheet

Speed calculation lesson 5: Running totals · Set 221 · 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. 1.86 + 38 + 77 + 30 =
  2. 2.83 + 51 + 75 + 18 =
  3. 3.27 + 75 + 42 + 53 =
  4. 4.47 + 81 + 75 + 52 =
  5. 5.83 + 34 + 45 + 45 =
  6. 6.49 + 19 + 89 + 42 =
  7. 7.24 + 70 + 70 + 47 =
  8. 8.33 + 33 + 28 + 28 =
  9. 9.16 + 35 + 86 + 19 =
  10. 10.73 + 33 + 52 + 26 =
  11. 11.48 + 36 + 45 + 30 =
  12. 12.29 + 27 + 28 + 72 =
  13. 13.75 + 70 + 12 + 59 =
  14. 14.88 + 55 + 46 + 84 =
  15. 15.24 + 58 + 28 + 75 =
  16. 16.47 + 23 + 56 + 56 =
  17. 17.67 + 49 + 22 + 42 =
  18. 18.27 + 57 + 84 + 78 =
  19. 19.79 + 18 + 85 + 12 =
  20. 20.73 + 33 + 76 + 32 =
  21. 21.44 + 89 + 76 + 19 =
  22. 22.65 + 51 + 19 + 19 =
  23. 23.70 + 80 + 65 + 33 =
  24. 24.50 + 30 + 72 + 24 =
  25. 25.22 + 47 + 32 + 50 =
  26. 26.17 + 14 + 37 + 44 =
  27. 27.53 + 66 + 68 + 72 =
  28. 28.32 + 34 + 61 + 12 =
  29. 29.49 + 74 + 34 + 71 =
  30. 30.22 + 63 + 14 + 64 =
  31. 31.64 + 26 + 48 + 76 =
  32. 32.39 + 20 + 86 + 75 =
  33. 33.85 + 38 + 73 + 73 =
  34. 34.54 + 15 + 37 + 38 =
  35. 35.80 + 72 + 30 + 35 =
  36. 36.40 + 88 + 71 + 71 =
  37. 37.19 + 26 + 25 + 43 =
  38. 38.31 + 64 + 25 + 75 =
  39. 39.74 + 85 + 89 + 68 =
  40. 40.45 + 54 + 45 + 19 =

Answer key

  1. 231
  2. 227
  3. 197
  4. 255
  5. 207
  6. 199
  7. 211
  8. 122
  9. 156
  10. 184
  11. 159
  12. 156
  13. 216
  14. 273
  15. 185
  16. 182
  17. 180
  18. 246
  19. 194
  20. 214
  21. 228
  22. 154
  23. 248
  24. 176
  25. 151
  26. 112
  27. 259
  28. 139
  29. 228
  30. 163
  31. 214
  32. 220
  33. 269
  34. 144
  35. 217
  36. 270
  37. 113
  38. 195
  39. 316
  40. 163

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