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Mental Addition Worksheet

Speed calculation lesson 5: Running totals · Set 536 · 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. 1.18 + 61 + 54 + 29 =
  2. 2.77 + 28 + 53 + 71 =
  3. 3.45 + 59 + 55 + 45 =
  4. 4.61 + 45 + 62 + 24 =
  5. 5.25 + 81 + 22 + 65 =
  6. 6.63 + 34 + 83 + 28 =
  7. 7.38 + 53 + 29 + 27 =
  8. 8.34 + 27 + 70 + 88 =
  9. 9.12 + 69 + 22 + 21 =
  10. 10.50 + 39 + 87 + 63 =
  11. 11.87 + 87 + 74 + 77 =
  12. 12.53 + 28 + 62 + 78 =
  13. 13.56 + 46 + 31 + 88 =
  14. 14.55 + 72 + 77 + 66 =
  15. 15.55 + 54 + 85 + 39 =
  16. 16.17 + 12 + 35 + 58 =
  17. 17.63 + 14 + 32 + 22 =
  18. 18.50 + 55 + 52 + 75 =
  19. 19.35 + 28 + 32 + 71 =
  20. 20.36 + 67 + 75 + 15 =
  21. 21.23 + 59 + 16 + 52 =
  22. 22.20 + 22 + 30 + 50 =
  23. 23.25 + 37 + 11 + 87 =
  24. 24.24 + 84 + 60 + 11 =
  25. 25.58 + 86 + 34 + 54 =
  26. 26.47 + 30 + 73 + 31 =
  27. 27.33 + 67 + 74 + 21 =
  28. 28.42 + 43 + 11 + 79 =
  29. 29.13 + 70 + 27 + 15 =
  30. 30.46 + 47 + 56 + 61 =
  31. 31.17 + 35 + 65 + 20 =
  32. 32.38 + 58 + 13 + 78 =
  33. 33.16 + 61 + 73 + 34 =
  34. 34.51 + 49 + 38 + 47 =
  35. 35.43 + 81 + 86 + 28 =
  36. 36.79 + 62 + 57 + 53 =
  37. 37.26 + 75 + 86 + 80 =
  38. 38.14 + 11 + 18 + 11 =
  39. 39.20 + 32 + 16 + 79 =
  40. 40.80 + 21 + 26 + 87 =

Answer key

  1. 162
  2. 229
  3. 204
  4. 192
  5. 193
  6. 208
  7. 147
  8. 219
  9. 124
  10. 239
  11. 325
  12. 221
  13. 221
  14. 270
  15. 233
  16. 122
  17. 131
  18. 232
  19. 166
  20. 193
  21. 150
  22. 122
  23. 160
  24. 179
  25. 232
  26. 181
  27. 195
  28. 175
  29. 125
  30. 210
  31. 137
  32. 187
  33. 184
  34. 185
  35. 238
  36. 251
  37. 267
  38. 54
  39. 147
  40. 214

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