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Mental Addition Worksheet

Speed calculation lesson 5: Running totals · Set 25 · 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. 1.76 + 64 + 45 + 33 =
  2. 2.36 + 83 + 40 + 86 =
  3. 3.64 + 16 + 22 + 57 =
  4. 4.83 + 70 + 55 + 86 =
  5. 5.56 + 32 + 53 + 37 =
  6. 6.83 + 85 + 63 + 58 =
  7. 7.15 + 36 + 29 + 58 =
  8. 8.74 + 27 + 26 + 33 =
  9. 9.87 + 55 + 68 + 59 =
  10. 10.86 + 76 + 74 + 29 =
  11. 11.26 + 45 + 51 + 44 =
  12. 12.68 + 63 + 78 + 30 =
  13. 13.79 + 69 + 80 + 32 =
  14. 14.19 + 21 + 24 + 49 =
  15. 15.76 + 35 + 13 + 35 =
  16. 16.55 + 55 + 56 + 52 =
  17. 17.31 + 55 + 62 + 21 =
  18. 18.17 + 14 + 53 + 54 =
  19. 19.42 + 27 + 33 + 89 =
  20. 20.73 + 37 + 47 + 29 =
  21. 21.87 + 49 + 63 + 23 =
  22. 22.62 + 34 + 82 + 50 =
  23. 23.74 + 31 + 66 + 39 =
  24. 24.71 + 67 + 28 + 51 =
  25. 25.50 + 77 + 39 + 22 =
  26. 26.44 + 48 + 37 + 36 =
  27. 27.67 + 13 + 77 + 78 =
  28. 28.57 + 31 + 24 + 65 =
  29. 29.66 + 71 + 46 + 27 =
  30. 30.28 + 32 + 35 + 21 =
  31. 31.16 + 48 + 75 + 88 =
  32. 32.84 + 61 + 70 + 11 =
  33. 33.89 + 32 + 22 + 35 =
  34. 34.67 + 36 + 79 + 71 =
  35. 35.21 + 44 + 60 + 83 =
  36. 36.20 + 49 + 71 + 49 =
  37. 37.11 + 68 + 17 + 70 =
  38. 38.16 + 36 + 31 + 79 =
  39. 39.69 + 21 + 62 + 77 =
  40. 40.15 + 15 + 89 + 49 =

Answer key

  1. 218
  2. 245
  3. 159
  4. 294
  5. 178
  6. 289
  7. 138
  8. 160
  9. 269
  10. 265
  11. 166
  12. 239
  13. 260
  14. 113
  15. 159
  16. 218
  17. 169
  18. 138
  19. 191
  20. 186
  21. 222
  22. 228
  23. 210
  24. 217
  25. 188
  26. 165
  27. 235
  28. 177
  29. 210
  30. 116
  31. 227
  32. 226
  33. 178
  34. 253
  35. 208
  36. 189
  37. 166
  38. 162
  39. 229
  40. 168

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