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Mental Addition Worksheet

Speed calculation lesson 5: Running totals · Set 241 · 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. 1.79 + 40 + 88 + 22 =
  2. 2.22 + 28 + 25 + 64 =
  3. 3.61 + 50 + 32 + 83 =
  4. 4.32 + 70 + 55 + 61 =
  5. 5.38 + 78 + 18 + 53 =
  6. 6.34 + 13 + 74 + 56 =
  7. 7.63 + 81 + 36 + 17 =
  8. 8.16 + 73 + 20 + 59 =
  9. 9.79 + 44 + 73 + 34 =
  10. 10.85 + 89 + 51 + 61 =
  11. 11.70 + 57 + 70 + 21 =
  12. 12.31 + 70 + 82 + 58 =
  13. 13.19 + 32 + 49 + 55 =
  14. 14.12 + 13 + 65 + 73 =
  15. 15.52 + 46 + 81 + 78 =
  16. 16.89 + 12 + 54 + 50 =
  17. 17.14 + 26 + 72 + 76 =
  18. 18.17 + 36 + 17 + 71 =
  19. 19.49 + 71 + 23 + 37 =
  20. 20.89 + 31 + 82 + 31 =
  21. 21.70 + 45 + 33 + 21 =
  22. 22.44 + 54 + 43 + 27 =
  23. 23.42 + 55 + 22 + 52 =
  24. 24.63 + 57 + 82 + 20 =
  25. 25.74 + 34 + 74 + 16 =
  26. 26.15 + 54 + 11 + 59 =
  27. 27.47 + 27 + 12 + 72 =
  28. 28.24 + 89 + 38 + 39 =
  29. 29.35 + 12 + 72 + 53 =
  30. 30.77 + 58 + 77 + 24 =
  31. 31.26 + 29 + 41 + 42 =
  32. 32.61 + 58 + 73 + 89 =
  33. 33.88 + 11 + 83 + 22 =
  34. 34.85 + 20 + 38 + 25 =
  35. 35.76 + 79 + 12 + 81 =
  36. 36.13 + 22 + 19 + 79 =
  37. 37.51 + 28 + 58 + 28 =
  38. 38.55 + 85 + 45 + 23 =
  39. 39.26 + 21 + 58 + 57 =
  40. 40.63 + 57 + 14 + 51 =

Answer key

  1. 229
  2. 139
  3. 226
  4. 218
  5. 187
  6. 177
  7. 197
  8. 168
  9. 230
  10. 286
  11. 218
  12. 241
  13. 155
  14. 163
  15. 257
  16. 205
  17. 188
  18. 141
  19. 180
  20. 233
  21. 169
  22. 168
  23. 171
  24. 222
  25. 198
  26. 139
  27. 158
  28. 190
  29. 172
  30. 236
  31. 138
  32. 281
  33. 204
  34. 168
  35. 248
  36. 133
  37. 165
  38. 208
  39. 162
  40. 185

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