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Mental Addition Worksheet

Speed calculation lesson 5: Running totals · Set 583 · 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. 1.70 + 22 + 14 + 52 =
  2. 2.53 + 63 + 89 + 38 =
  3. 3.50 + 19 + 89 + 79 =
  4. 4.86 + 64 + 27 + 15 =
  5. 5.74 + 33 + 71 + 58 =
  6. 6.32 + 67 + 77 + 83 =
  7. 7.21 + 81 + 51 + 66 =
  8. 8.38 + 19 + 81 + 30 =
  9. 9.12 + 16 + 77 + 70 =
  10. 10.64 + 14 + 76 + 65 =
  11. 11.59 + 69 + 47 + 22 =
  12. 12.13 + 12 + 14 + 11 =
  13. 13.81 + 70 + 86 + 28 =
  14. 14.76 + 63 + 53 + 17 =
  15. 15.13 + 29 + 11 + 26 =
  16. 16.56 + 54 + 12 + 73 =
  17. 17.32 + 44 + 18 + 17 =
  18. 18.85 + 27 + 59 + 16 =
  19. 19.47 + 16 + 11 + 85 =
  20. 20.39 + 24 + 81 + 56 =
  21. 21.21 + 34 + 32 + 29 =
  22. 22.15 + 49 + 37 + 33 =
  23. 23.57 + 13 + 88 + 53 =
  24. 24.39 + 39 + 44 + 83 =
  25. 25.66 + 72 + 65 + 41 =
  26. 26.42 + 81 + 42 + 63 =
  27. 27.52 + 33 + 88 + 76 =
  28. 28.86 + 27 + 30 + 70 =
  29. 29.45 + 81 + 22 + 79 =
  30. 30.32 + 43 + 21 + 84 =
  31. 31.24 + 82 + 43 + 31 =
  32. 32.58 + 59 + 13 + 80 =
  33. 33.36 + 13 + 29 + 22 =
  34. 34.27 + 53 + 79 + 14 =
  35. 35.50 + 66 + 82 + 55 =
  36. 36.41 + 63 + 44 + 44 =
  37. 37.22 + 46 + 58 + 40 =
  38. 38.87 + 64 + 19 + 19 =
  39. 39.54 + 73 + 33 + 74 =
  40. 40.19 + 69 + 48 + 35 =

Answer key

  1. 158
  2. 243
  3. 237
  4. 192
  5. 236
  6. 259
  7. 219
  8. 168
  9. 175
  10. 219
  11. 197
  12. 50
  13. 265
  14. 209
  15. 79
  16. 195
  17. 111
  18. 187
  19. 159
  20. 200
  21. 116
  22. 134
  23. 211
  24. 205
  25. 244
  26. 228
  27. 249
  28. 213
  29. 227
  30. 180
  31. 180
  32. 210
  33. 100
  34. 173
  35. 253
  36. 192
  37. 166
  38. 189
  39. 234
  40. 171

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