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Mental Addition Worksheet

Speed calculation lesson 5: Running totals · Set 212 · 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. 1.26 + 15 + 27 + 33 =
  2. 2.41 + 52 + 22 + 30 =
  3. 3.42 + 17 + 74 + 33 =
  4. 4.59 + 38 + 81 + 85 =
  5. 5.65 + 29 + 26 + 68 =
  6. 6.44 + 31 + 88 + 83 =
  7. 7.61 + 68 + 12 + 88 =
  8. 8.23 + 72 + 71 + 41 =
  9. 9.19 + 17 + 73 + 33 =
  10. 10.23 + 47 + 27 + 15 =
  11. 11.24 + 32 + 73 + 77 =
  12. 12.72 + 16 + 35 + 42 =
  13. 13.48 + 17 + 30 + 41 =
  14. 14.53 + 41 + 36 + 85 =
  15. 15.28 + 35 + 28 + 22 =
  16. 16.64 + 14 + 83 + 67 =
  17. 17.36 + 21 + 45 + 18 =
  18. 18.54 + 19 + 63 + 26 =
  19. 19.61 + 12 + 40 + 42 =
  20. 20.18 + 67 + 49 + 82 =
  21. 21.12 + 35 + 40 + 77 =
  22. 22.84 + 33 + 50 + 68 =
  23. 23.77 + 37 + 29 + 45 =
  24. 24.45 + 49 + 37 + 27 =
  25. 25.88 + 37 + 55 + 80 =
  26. 26.24 + 42 + 55 + 55 =
  27. 27.47 + 40 + 12 + 31 =
  28. 28.87 + 15 + 17 + 11 =
  29. 29.74 + 63 + 14 + 38 =
  30. 30.72 + 89 + 14 + 45 =
  31. 31.14 + 12 + 66 + 23 =
  32. 32.59 + 30 + 13 + 64 =
  33. 33.12 + 43 + 15 + 46 =
  34. 34.79 + 47 + 19 + 23 =
  35. 35.25 + 11 + 62 + 19 =
  36. 36.25 + 57 + 41 + 80 =
  37. 37.56 + 33 + 43 + 84 =
  38. 38.30 + 58 + 29 + 33 =
  39. 39.42 + 70 + 53 + 56 =
  40. 40.82 + 46 + 58 + 70 =

Answer key

  1. 101
  2. 145
  3. 166
  4. 263
  5. 188
  6. 246
  7. 229
  8. 207
  9. 142
  10. 112
  11. 206
  12. 165
  13. 136
  14. 215
  15. 113
  16. 228
  17. 120
  18. 162
  19. 155
  20. 216
  21. 164
  22. 235
  23. 188
  24. 158
  25. 260
  26. 176
  27. 130
  28. 130
  29. 189
  30. 220
  31. 115
  32. 166
  33. 116
  34. 168
  35. 117
  36. 203
  37. 216
  38. 150
  39. 221
  40. 256

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