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Mental Addition Worksheet

Speed calculation lesson 5: Running totals · Set 329 · 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. 1.34 + 86 + 27 + 13 =
  2. 2.27 + 40 + 44 + 13 =
  3. 3.15 + 15 + 51 + 88 =
  4. 4.17 + 22 + 14 + 19 =
  5. 5.37 + 30 + 36 + 26 =
  6. 6.65 + 31 + 19 + 12 =
  7. 7.20 + 76 + 51 + 45 =
  8. 8.53 + 71 + 51 + 51 =
  9. 9.42 + 70 + 12 + 42 =
  10. 10.57 + 38 + 32 + 61 =
  11. 11.67 + 87 + 20 + 53 =
  12. 12.77 + 71 + 41 + 27 =
  13. 13.54 + 31 + 89 + 80 =
  14. 14.27 + 62 + 58 + 57 =
  15. 15.29 + 89 + 13 + 66 =
  16. 16.74 + 73 + 70 + 69 =
  17. 17.52 + 13 + 48 + 14 =
  18. 18.22 + 40 + 30 + 25 =
  19. 19.36 + 87 + 14 + 61 =
  20. 20.44 + 24 + 11 + 82 =
  21. 21.65 + 37 + 22 + 46 =
  22. 22.74 + 59 + 68 + 53 =
  23. 23.71 + 15 + 31 + 21 =
  24. 24.39 + 12 + 40 + 25 =
  25. 25.55 + 31 + 34 + 69 =
  26. 26.25 + 32 + 64 + 20 =
  27. 27.60 + 39 + 53 + 61 =
  28. 28.20 + 16 + 19 + 18 =
  29. 29.72 + 29 + 48 + 24 =
  30. 30.15 + 74 + 21 + 68 =
  31. 31.26 + 50 + 26 + 80 =
  32. 32.55 + 61 + 82 + 86 =
  33. 33.75 + 77 + 44 + 74 =
  34. 34.83 + 40 + 14 + 36 =
  35. 35.85 + 45 + 31 + 17 =
  36. 36.69 + 89 + 63 + 39 =
  37. 37.62 + 58 + 19 + 41 =
  38. 38.89 + 21 + 68 + 31 =
  39. 39.21 + 47 + 79 + 21 =
  40. 40.11 + 64 + 86 + 53 =

Answer key

  1. 160
  2. 124
  3. 169
  4. 72
  5. 129
  6. 127
  7. 192
  8. 226
  9. 166
  10. 188
  11. 227
  12. 216
  13. 254
  14. 204
  15. 197
  16. 286
  17. 127
  18. 117
  19. 198
  20. 161
  21. 170
  22. 254
  23. 138
  24. 116
  25. 189
  26. 141
  27. 213
  28. 73
  29. 173
  30. 178
  31. 182
  32. 284
  33. 270
  34. 173
  35. 178
  36. 260
  37. 180
  38. 209
  39. 168
  40. 214

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