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Mental Addition Worksheet

Speed calculation lesson 5: Running totals · Set 585 · 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. 1.89 + 65 + 89 + 76 =
  2. 2.23 + 88 + 27 + 53 =
  3. 3.72 + 21 + 11 + 50 =
  4. 4.46 + 76 + 47 + 27 =
  5. 5.28 + 62 + 16 + 12 =
  6. 6.32 + 44 + 67 + 21 =
  7. 7.15 + 65 + 51 + 66 =
  8. 8.30 + 70 + 17 + 13 =
  9. 9.19 + 75 + 82 + 33 =
  10. 10.64 + 65 + 24 + 20 =
  11. 11.56 + 51 + 54 + 44 =
  12. 12.59 + 86 + 83 + 11 =
  13. 13.85 + 62 + 21 + 39 =
  14. 14.77 + 57 + 60 + 52 =
  15. 15.15 + 28 + 75 + 33 =
  16. 16.50 + 37 + 48 + 66 =
  17. 17.14 + 20 + 81 + 32 =
  18. 18.29 + 28 + 41 + 78 =
  19. 19.28 + 55 + 42 + 26 =
  20. 20.62 + 65 + 25 + 32 =
  21. 21.74 + 77 + 50 + 47 =
  22. 22.48 + 63 + 64 + 19 =
  23. 23.23 + 50 + 69 + 53 =
  24. 24.19 + 33 + 49 + 42 =
  25. 25.72 + 33 + 76 + 78 =
  26. 26.29 + 73 + 65 + 27 =
  27. 27.74 + 60 + 79 + 19 =
  28. 28.73 + 66 + 63 + 60 =
  29. 29.56 + 28 + 14 + 24 =
  30. 30.33 + 64 + 22 + 61 =
  31. 31.51 + 31 + 44 + 23 =
  32. 32.50 + 27 + 31 + 17 =
  33. 33.16 + 38 + 78 + 18 =
  34. 34.49 + 75 + 74 + 27 =
  35. 35.72 + 22 + 24 + 24 =
  36. 36.68 + 41 + 87 + 69 =
  37. 37.22 + 77 + 26 + 41 =
  38. 38.42 + 27 + 14 + 65 =
  39. 39.13 + 42 + 55 + 83 =
  40. 40.55 + 49 + 25 + 14 =

Answer key

  1. 319
  2. 191
  3. 154
  4. 196
  5. 118
  6. 164
  7. 197
  8. 130
  9. 209
  10. 173
  11. 205
  12. 239
  13. 207
  14. 246
  15. 151
  16. 201
  17. 147
  18. 176
  19. 151
  20. 184
  21. 248
  22. 194
  23. 195
  24. 143
  25. 259
  26. 194
  27. 232
  28. 262
  29. 122
  30. 180
  31. 149
  32. 125
  33. 150
  34. 225
  35. 142
  36. 265
  37. 166
  38. 148
  39. 193
  40. 143

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