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Mental Addition Worksheet

Speed calculation lesson 5: Running totals · Set 269 · 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. 1.44 + 64 + 26 + 79 =
  2. 2.74 + 16 + 76 + 70 =
  3. 3.67 + 69 + 57 + 48 =
  4. 4.76 + 77 + 39 + 54 =
  5. 5.43 + 87 + 64 + 46 =
  6. 6.23 + 42 + 36 + 85 =
  7. 7.78 + 29 + 79 + 22 =
  8. 8.66 + 62 + 79 + 11 =
  9. 9.83 + 84 + 16 + 43 =
  10. 10.39 + 33 + 69 + 89 =
  11. 11.18 + 14 + 15 + 24 =
  12. 12.80 + 31 + 50 + 72 =
  13. 13.86 + 57 + 19 + 12 =
  14. 14.43 + 65 + 31 + 69 =
  15. 15.74 + 61 + 18 + 58 =
  16. 16.20 + 70 + 28 + 20 =
  17. 17.43 + 28 + 65 + 21 =
  18. 18.46 + 23 + 68 + 30 =
  19. 19.27 + 60 + 46 + 35 =
  20. 20.42 + 63 + 55 + 49 =
  21. 21.43 + 86 + 62 + 20 =
  22. 22.18 + 49 + 31 + 81 =
  23. 23.39 + 42 + 61 + 49 =
  24. 24.69 + 41 + 75 + 37 =
  25. 25.64 + 14 + 14 + 13 =
  26. 26.55 + 78 + 33 + 21 =
  27. 27.51 + 14 + 49 + 23 =
  28. 28.23 + 49 + 46 + 51 =
  29. 29.31 + 73 + 76 + 31 =
  30. 30.75 + 49 + 40 + 23 =
  31. 31.14 + 27 + 74 + 24 =
  32. 32.50 + 75 + 34 + 14 =
  33. 33.11 + 40 + 11 + 24 =
  34. 34.27 + 85 + 83 + 16 =
  35. 35.53 + 52 + 33 + 47 =
  36. 36.15 + 26 + 82 + 70 =
  37. 37.61 + 60 + 33 + 47 =
  38. 38.17 + 87 + 74 + 72 =
  39. 39.33 + 63 + 30 + 45 =
  40. 40.59 + 11 + 30 + 17 =

Answer key

  1. 213
  2. 236
  3. 241
  4. 246
  5. 240
  6. 186
  7. 208
  8. 218
  9. 226
  10. 230
  11. 71
  12. 233
  13. 174
  14. 208
  15. 211
  16. 138
  17. 157
  18. 167
  19. 168
  20. 209
  21. 211
  22. 179
  23. 191
  24. 222
  25. 105
  26. 187
  27. 137
  28. 169
  29. 211
  30. 187
  31. 139
  32. 173
  33. 86
  34. 211
  35. 185
  36. 193
  37. 201
  38. 250
  39. 171
  40. 117

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