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Mental Addition Worksheet

Speed calculation lesson 5: Running totals · Set 731 · 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. 1.32 + 29 + 24 + 13 =
  2. 2.67 + 86 + 57 + 48 =
  3. 3.62 + 37 + 44 + 63 =
  4. 4.45 + 70 + 12 + 12 =
  5. 5.16 + 18 + 28 + 18 =
  6. 6.78 + 58 + 36 + 33 =
  7. 7.59 + 73 + 88 + 41 =
  8. 8.17 + 21 + 65 + 47 =
  9. 9.13 + 62 + 70 + 32 =
  10. 10.30 + 71 + 58 + 85 =
  11. 11.20 + 31 + 40 + 41 =
  12. 12.44 + 73 + 58 + 29 =
  13. 13.85 + 16 + 54 + 85 =
  14. 14.84 + 79 + 55 + 33 =
  15. 15.19 + 67 + 79 + 87 =
  16. 16.18 + 26 + 20 + 49 =
  17. 17.21 + 25 + 32 + 51 =
  18. 18.14 + 51 + 59 + 71 =
  19. 19.58 + 76 + 24 + 28 =
  20. 20.82 + 34 + 18 + 22 =
  21. 21.38 + 75 + 68 + 56 =
  22. 22.23 + 21 + 44 + 47 =
  23. 23.85 + 44 + 62 + 52 =
  24. 24.39 + 83 + 15 + 51 =
  25. 25.42 + 14 + 25 + 25 =
  26. 26.69 + 29 + 66 + 34 =
  27. 27.15 + 48 + 72 + 62 =
  28. 28.68 + 52 + 28 + 71 =
  29. 29.37 + 42 + 82 + 30 =
  30. 30.84 + 51 + 25 + 33 =
  31. 31.71 + 75 + 55 + 53 =
  32. 32.19 + 26 + 35 + 74 =
  33. 33.15 + 16 + 41 + 51 =
  34. 34.61 + 14 + 76 + 41 =
  35. 35.13 + 81 + 26 + 23 =
  36. 36.67 + 20 + 18 + 33 =
  37. 37.44 + 44 + 62 + 50 =
  38. 38.12 + 36 + 78 + 30 =
  39. 39.37 + 36 + 13 + 42 =
  40. 40.23 + 29 + 33 + 11 =

Answer key

  1. 98
  2. 258
  3. 206
  4. 139
  5. 80
  6. 205
  7. 261
  8. 150
  9. 177
  10. 244
  11. 132
  12. 204
  13. 240
  14. 251
  15. 252
  16. 113
  17. 129
  18. 195
  19. 186
  20. 156
  21. 237
  22. 135
  23. 243
  24. 188
  25. 106
  26. 198
  27. 197
  28. 219
  29. 191
  30. 193
  31. 254
  32. 154
  33. 123
  34. 192
  35. 143
  36. 138
  37. 200
  38. 156
  39. 128
  40. 96

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