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Mental Addition Worksheet

Speed calculation lesson 5: Running totals · Set 350 · 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. 1.63 + 21 + 76 + 83 =
  2. 2.80 + 75 + 12 + 72 =
  3. 3.30 + 27 + 22 + 49 =
  4. 4.33 + 55 + 38 + 51 =
  5. 5.49 + 36 + 37 + 64 =
  6. 6.73 + 29 + 37 + 58 =
  7. 7.51 + 61 + 58 + 78 =
  8. 8.81 + 71 + 42 + 21 =
  9. 9.50 + 50 + 35 + 77 =
  10. 10.62 + 89 + 60 + 88 =
  11. 11.77 + 45 + 44 + 37 =
  12. 12.41 + 23 + 67 + 57 =
  13. 13.79 + 44 + 72 + 69 =
  14. 14.63 + 77 + 42 + 87 =
  15. 15.32 + 65 + 33 + 86 =
  16. 16.41 + 33 + 43 + 71 =
  17. 17.25 + 47 + 60 + 17 =
  18. 18.50 + 43 + 56 + 73 =
  19. 19.80 + 37 + 39 + 19 =
  20. 20.87 + 78 + 85 + 51 =
  21. 21.61 + 18 + 58 + 68 =
  22. 22.85 + 75 + 49 + 32 =
  23. 23.51 + 88 + 12 + 16 =
  24. 24.50 + 80 + 27 + 20 =
  25. 25.26 + 20 + 31 + 44 =
  26. 26.30 + 53 + 35 + 75 =
  27. 27.25 + 27 + 68 + 89 =
  28. 28.17 + 54 + 64 + 36 =
  29. 29.14 + 16 + 89 + 36 =
  30. 30.53 + 78 + 19 + 72 =
  31. 31.83 + 34 + 70 + 64 =
  32. 32.53 + 82 + 38 + 23 =
  33. 33.65 + 28 + 45 + 47 =
  34. 34.23 + 77 + 84 + 30 =
  35. 35.78 + 36 + 59 + 25 =
  36. 36.30 + 46 + 53 + 20 =
  37. 37.68 + 57 + 65 + 45 =
  38. 38.61 + 24 + 26 + 16 =
  39. 39.73 + 54 + 30 + 64 =
  40. 40.28 + 22 + 61 + 67 =

Answer key

  1. 243
  2. 239
  3. 128
  4. 177
  5. 186
  6. 197
  7. 248
  8. 215
  9. 212
  10. 299
  11. 203
  12. 188
  13. 264
  14. 269
  15. 216
  16. 188
  17. 149
  18. 222
  19. 175
  20. 301
  21. 205
  22. 241
  23. 167
  24. 177
  25. 121
  26. 193
  27. 209
  28. 171
  29. 155
  30. 222
  31. 251
  32. 196
  33. 185
  34. 214
  35. 198
  36. 149
  37. 235
  38. 127
  39. 221
  40. 178

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