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Mental Addition Worksheet

Speed calculation lesson 5: Running totals · Set 991 · 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. 1.37 + 32 + 48 + 80 =
  2. 2.72 + 18 + 88 + 87 =
  3. 3.47 + 48 + 40 + 78 =
  4. 4.50 + 22 + 53 + 52 =
  5. 5.19 + 49 + 69 + 71 =
  6. 6.59 + 43 + 53 + 35 =
  7. 7.64 + 23 + 41 + 57 =
  8. 8.53 + 42 + 89 + 26 =
  9. 9.75 + 24 + 20 + 74 =
  10. 10.87 + 19 + 16 + 88 =
  11. 11.25 + 33 + 75 + 26 =
  12. 12.62 + 43 + 47 + 43 =
  13. 13.58 + 81 + 76 + 28 =
  14. 14.13 + 54 + 25 + 83 =
  15. 15.87 + 15 + 36 + 75 =
  16. 16.86 + 61 + 77 + 41 =
  17. 17.28 + 88 + 49 + 16 =
  18. 18.53 + 57 + 31 + 77 =
  19. 19.17 + 66 + 67 + 22 =
  20. 20.27 + 49 + 41 + 26 =
  21. 21.75 + 85 + 52 + 28 =
  22. 22.64 + 53 + 45 + 12 =
  23. 23.31 + 58 + 54 + 11 =
  24. 24.48 + 57 + 20 + 72 =
  25. 25.84 + 60 + 45 + 16 =
  26. 26.71 + 46 + 67 + 27 =
  27. 27.14 + 75 + 68 + 79 =
  28. 28.27 + 81 + 88 + 83 =
  29. 29.65 + 26 + 43 + 38 =
  30. 30.81 + 35 + 50 + 67 =
  31. 31.48 + 89 + 43 + 41 =
  32. 32.28 + 39 + 33 + 76 =
  33. 33.80 + 18 + 19 + 74 =
  34. 34.37 + 85 + 77 + 43 =
  35. 35.74 + 25 + 37 + 81 =
  36. 36.51 + 12 + 84 + 11 =
  37. 37.60 + 64 + 11 + 68 =
  38. 38.87 + 39 + 23 + 57 =
  39. 39.20 + 41 + 18 + 69 =
  40. 40.72 + 44 + 86 + 43 =

Answer key

  1. 197
  2. 265
  3. 213
  4. 177
  5. 208
  6. 190
  7. 185
  8. 210
  9. 193
  10. 210
  11. 159
  12. 195
  13. 243
  14. 175
  15. 213
  16. 265
  17. 181
  18. 218
  19. 172
  20. 143
  21. 240
  22. 174
  23. 154
  24. 197
  25. 205
  26. 211
  27. 236
  28. 279
  29. 172
  30. 233
  31. 221
  32. 176
  33. 191
  34. 242
  35. 217
  36. 158
  37. 203
  38. 206
  39. 148
  40. 245

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