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Mental Addition Worksheet

Speed calculation lesson 5: Running totals · Set 674 · 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. 1.86 + 89 + 77 + 38 =
  2. 2.27 + 31 + 30 + 26 =
  3. 3.11 + 75 + 73 + 67 =
  4. 4.47 + 32 + 34 + 22 =
  5. 5.71 + 56 + 44 + 18 =
  6. 6.72 + 28 + 32 + 65 =
  7. 7.42 + 58 + 50 + 75 =
  8. 8.14 + 36 + 68 + 14 =
  9. 9.81 + 32 + 28 + 24 =
  10. 10.27 + 65 + 72 + 12 =
  11. 11.42 + 12 + 39 + 41 =
  12. 12.26 + 23 + 76 + 58 =
  13. 13.19 + 59 + 16 + 21 =
  14. 14.62 + 73 + 61 + 71 =
  15. 15.84 + 53 + 69 + 75 =
  16. 16.49 + 54 + 66 + 38 =
  17. 17.55 + 70 + 29 + 11 =
  18. 18.85 + 69 + 60 + 33 =
  19. 19.27 + 45 + 29 + 46 =
  20. 20.54 + 64 + 75 + 61 =
  21. 21.45 + 46 + 79 + 23 =
  22. 22.18 + 60 + 29 + 26 =
  23. 23.31 + 59 + 30 + 32 =
  24. 24.38 + 59 + 35 + 29 =
  25. 25.29 + 24 + 72 + 77 =
  26. 26.79 + 17 + 51 + 29 =
  27. 27.78 + 24 + 22 + 30 =
  28. 28.19 + 72 + 31 + 86 =
  29. 29.44 + 75 + 76 + 74 =
  30. 30.78 + 23 + 22 + 39 =
  31. 31.46 + 39 + 23 + 89 =
  32. 32.83 + 79 + 27 + 57 =
  33. 33.73 + 17 + 62 + 57 =
  34. 34.88 + 86 + 17 + 45 =
  35. 35.57 + 45 + 28 + 86 =
  36. 36.73 + 52 + 25 + 21 =
  37. 37.73 + 45 + 59 + 11 =
  38. 38.19 + 14 + 39 + 78 =
  39. 39.62 + 22 + 58 + 70 =
  40. 40.88 + 70 + 52 + 14 =

Answer key

  1. 290
  2. 114
  3. 226
  4. 135
  5. 189
  6. 197
  7. 225
  8. 132
  9. 165
  10. 176
  11. 134
  12. 183
  13. 115
  14. 267
  15. 281
  16. 207
  17. 165
  18. 247
  19. 147
  20. 254
  21. 193
  22. 133
  23. 152
  24. 161
  25. 202
  26. 176
  27. 154
  28. 208
  29. 269
  30. 162
  31. 197
  32. 246
  33. 209
  34. 236
  35. 216
  36. 171
  37. 188
  38. 150
  39. 212
  40. 224

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