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Mental Addition Worksheet

Speed calculation lesson 5: Running totals · Set 634 · 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. 1.55 + 48 + 53 + 50 =
  2. 2.25 + 88 + 77 + 46 =
  3. 3.71 + 59 + 86 + 49 =
  4. 4.16 + 50 + 81 + 78 =
  5. 5.67 + 37 + 61 + 37 =
  6. 6.81 + 27 + 61 + 25 =
  7. 7.30 + 29 + 67 + 46 =
  8. 8.50 + 46 + 75 + 60 =
  9. 9.28 + 57 + 41 + 71 =
  10. 10.64 + 27 + 58 + 44 =
  11. 11.86 + 19 + 17 + 72 =
  12. 12.80 + 52 + 46 + 35 =
  13. 13.63 + 57 + 81 + 56 =
  14. 14.86 + 23 + 37 + 27 =
  15. 15.53 + 44 + 88 + 16 =
  16. 16.71 + 13 + 45 + 30 =
  17. 17.22 + 63 + 21 + 76 =
  18. 18.33 + 66 + 41 + 62 =
  19. 19.30 + 86 + 46 + 39 =
  20. 20.66 + 82 + 47 + 21 =
  21. 21.18 + 47 + 69 + 55 =
  22. 22.34 + 55 + 18 + 42 =
  23. 23.14 + 84 + 18 + 43 =
  24. 24.77 + 87 + 51 + 12 =
  25. 25.54 + 37 + 80 + 83 =
  26. 26.61 + 24 + 77 + 36 =
  27. 27.75 + 81 + 41 + 56 =
  28. 28.46 + 30 + 71 + 76 =
  29. 29.79 + 65 + 11 + 22 =
  30. 30.85 + 46 + 21 + 69 =
  31. 31.51 + 60 + 26 + 26 =
  32. 32.65 + 42 + 50 + 15 =
  33. 33.86 + 57 + 29 + 49 =
  34. 34.42 + 78 + 40 + 17 =
  35. 35.33 + 71 + 79 + 43 =
  36. 36.30 + 27 + 44 + 34 =
  37. 37.60 + 76 + 51 + 19 =
  38. 38.15 + 69 + 15 + 68 =
  39. 39.63 + 75 + 55 + 81 =
  40. 40.25 + 43 + 47 + 85 =

Answer key

  1. 206
  2. 236
  3. 265
  4. 225
  5. 202
  6. 194
  7. 172
  8. 231
  9. 197
  10. 193
  11. 194
  12. 213
  13. 257
  14. 173
  15. 201
  16. 159
  17. 182
  18. 202
  19. 201
  20. 216
  21. 189
  22. 149
  23. 159
  24. 227
  25. 254
  26. 198
  27. 253
  28. 223
  29. 177
  30. 221
  31. 163
  32. 172
  33. 221
  34. 177
  35. 226
  36. 135
  37. 206
  38. 167
  39. 274
  40. 200

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