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Mental Addition Worksheet

Speed calculation lesson 5: Running totals · Set 205 · 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. 1.14 + 37 + 59 + 43 =
  2. 2.53 + 60 + 62 + 75 =
  3. 3.21 + 46 + 12 + 29 =
  4. 4.23 + 16 + 36 + 70 =
  5. 5.54 + 63 + 28 + 13 =
  6. 6.42 + 48 + 84 + 43 =
  7. 7.42 + 26 + 75 + 69 =
  8. 8.24 + 63 + 42 + 56 =
  9. 9.70 + 60 + 32 + 24 =
  10. 10.26 + 34 + 64 + 49 =
  11. 11.85 + 71 + 18 + 61 =
  12. 12.51 + 23 + 30 + 54 =
  13. 13.59 + 51 + 82 + 44 =
  14. 14.76 + 84 + 20 + 81 =
  15. 15.82 + 18 + 84 + 19 =
  16. 16.89 + 27 + 54 + 17 =
  17. 17.72 + 35 + 22 + 84 =
  18. 18.50 + 73 + 63 + 79 =
  19. 19.46 + 36 + 72 + 58 =
  20. 20.72 + 69 + 26 + 83 =
  21. 21.34 + 75 + 23 + 13 =
  22. 22.57 + 69 + 23 + 66 =
  23. 23.47 + 79 + 13 + 74 =
  24. 24.36 + 52 + 44 + 61 =
  25. 25.17 + 76 + 12 + 42 =
  26. 26.89 + 43 + 43 + 43 =
  27. 27.76 + 22 + 23 + 85 =
  28. 28.64 + 73 + 12 + 78 =
  29. 29.80 + 77 + 65 + 11 =
  30. 30.84 + 63 + 29 + 52 =
  31. 31.15 + 12 + 34 + 66 =
  32. 32.60 + 18 + 58 + 39 =
  33. 33.88 + 48 + 12 + 65 =
  34. 34.38 + 11 + 68 + 55 =
  35. 35.51 + 35 + 20 + 20 =
  36. 36.71 + 13 + 85 + 15 =
  37. 37.19 + 12 + 28 + 60 =
  38. 38.89 + 24 + 71 + 45 =
  39. 39.17 + 57 + 46 + 75 =
  40. 40.19 + 30 + 15 + 35 =

Answer key

  1. 153
  2. 250
  3. 108
  4. 145
  5. 158
  6. 217
  7. 212
  8. 185
  9. 186
  10. 173
  11. 235
  12. 158
  13. 236
  14. 261
  15. 203
  16. 187
  17. 213
  18. 265
  19. 212
  20. 250
  21. 145
  22. 215
  23. 213
  24. 193
  25. 147
  26. 218
  27. 206
  28. 227
  29. 233
  30. 228
  31. 127
  32. 175
  33. 213
  34. 172
  35. 126
  36. 184
  37. 119
  38. 229
  39. 195
  40. 99

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