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Mental Addition Worksheet

Speed calculation lesson 5: Running totals · Set 334 · 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. 1.71 + 20 + 24 + 19 =
  2. 2.55 + 72 + 32 + 57 =
  3. 3.27 + 14 + 11 + 52 =
  4. 4.20 + 46 + 47 + 22 =
  5. 5.27 + 12 + 68 + 21 =
  6. 6.36 + 87 + 36 + 69 =
  7. 7.12 + 34 + 57 + 83 =
  8. 8.58 + 89 + 38 + 66 =
  9. 9.81 + 20 + 27 + 79 =
  10. 10.19 + 14 + 59 + 47 =
  11. 11.52 + 51 + 53 + 47 =
  12. 12.78 + 75 + 58 + 71 =
  13. 13.59 + 64 + 47 + 39 =
  14. 14.40 + 43 + 54 + 44 =
  15. 15.31 + 49 + 87 + 61 =
  16. 16.83 + 29 + 48 + 76 =
  17. 17.77 + 78 + 30 + 21 =
  18. 18.39 + 75 + 33 + 81 =
  19. 19.27 + 48 + 17 + 18 =
  20. 20.64 + 24 + 22 + 48 =
  21. 21.80 + 49 + 13 + 34 =
  22. 22.18 + 87 + 73 + 86 =
  23. 23.70 + 52 + 14 + 64 =
  24. 24.11 + 54 + 53 + 47 =
  25. 25.20 + 61 + 11 + 89 =
  26. 26.37 + 85 + 31 + 13 =
  27. 27.89 + 59 + 24 + 51 =
  28. 28.25 + 17 + 67 + 23 =
  29. 29.46 + 49 + 25 + 19 =
  30. 30.26 + 74 + 61 + 56 =
  31. 31.60 + 58 + 46 + 43 =
  32. 32.24 + 34 + 37 + 54 =
  33. 33.89 + 48 + 63 + 25 =
  34. 34.63 + 32 + 20 + 53 =
  35. 35.81 + 56 + 64 + 84 =
  36. 36.43 + 60 + 65 + 26 =
  37. 37.75 + 30 + 28 + 85 =
  38. 38.66 + 46 + 64 + 71 =
  39. 39.67 + 21 + 66 + 56 =
  40. 40.14 + 19 + 59 + 63 =

Answer key

  1. 134
  2. 216
  3. 104
  4. 135
  5. 128
  6. 228
  7. 186
  8. 251
  9. 207
  10. 139
  11. 203
  12. 282
  13. 209
  14. 181
  15. 228
  16. 236
  17. 206
  18. 228
  19. 110
  20. 158
  21. 176
  22. 264
  23. 200
  24. 165
  25. 181
  26. 166
  27. 223
  28. 132
  29. 139
  30. 217
  31. 207
  32. 149
  33. 225
  34. 168
  35. 285
  36. 194
  37. 218
  38. 247
  39. 210
  40. 155

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