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Mental Addition Worksheet

Speed calculation lesson 5: Running totals · Set 745 · 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. 1.50 + 53 + 28 + 21 =
  2. 2.82 + 32 + 62 + 55 =
  3. 3.19 + 17 + 89 + 68 =
  4. 4.39 + 19 + 41 + 49 =
  5. 5.24 + 83 + 68 + 88 =
  6. 6.50 + 61 + 30 + 69 =
  7. 7.28 + 62 + 45 + 58 =
  8. 8.51 + 64 + 69 + 18 =
  9. 9.70 + 71 + 29 + 35 =
  10. 10.82 + 53 + 55 + 15 =
  11. 11.30 + 89 + 66 + 76 =
  12. 12.29 + 68 + 21 + 69 =
  13. 13.22 + 50 + 25 + 47 =
  14. 14.33 + 14 + 30 + 45 =
  15. 15.28 + 48 + 48 + 21 =
  16. 16.29 + 27 + 11 + 19 =
  17. 17.40 + 33 + 44 + 56 =
  18. 18.81 + 49 + 46 + 55 =
  19. 19.21 + 70 + 35 + 34 =
  20. 20.78 + 21 + 68 + 76 =
  21. 21.19 + 11 + 36 + 48 =
  22. 22.69 + 16 + 35 + 32 =
  23. 23.78 + 33 + 77 + 12 =
  24. 24.23 + 72 + 89 + 62 =
  25. 25.54 + 69 + 68 + 38 =
  26. 26.65 + 43 + 24 + 22 =
  27. 27.49 + 63 + 81 + 59 =
  28. 28.83 + 46 + 89 + 31 =
  29. 29.80 + 20 + 51 + 30 =
  30. 30.71 + 24 + 52 + 60 =
  31. 31.59 + 44 + 64 + 69 =
  32. 32.32 + 67 + 14 + 87 =
  33. 33.75 + 15 + 81 + 16 =
  34. 34.36 + 40 + 24 + 16 =
  35. 35.73 + 44 + 71 + 60 =
  36. 36.83 + 22 + 62 + 17 =
  37. 37.72 + 47 + 71 + 47 =
  38. 38.38 + 54 + 82 + 86 =
  39. 39.15 + 43 + 13 + 42 =
  40. 40.31 + 43 + 76 + 62 =

Answer key

  1. 152
  2. 231
  3. 193
  4. 148
  5. 263
  6. 210
  7. 193
  8. 202
  9. 205
  10. 205
  11. 261
  12. 187
  13. 144
  14. 122
  15. 145
  16. 86
  17. 173
  18. 231
  19. 160
  20. 243
  21. 114
  22. 152
  23. 200
  24. 246
  25. 229
  26. 154
  27. 252
  28. 249
  29. 181
  30. 207
  31. 236
  32. 200
  33. 187
  34. 116
  35. 248
  36. 184
  37. 237
  38. 260
  39. 113
  40. 212

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