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Mental Addition Worksheet

Speed calculation lesson 5: Running totals · Set 250 · 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. 1.40 + 52 + 15 + 65 =
  2. 2.61 + 56 + 61 + 62 =
  3. 3.46 + 86 + 29 + 79 =
  4. 4.57 + 14 + 20 + 87 =
  5. 5.76 + 80 + 33 + 74 =
  6. 6.15 + 19 + 46 + 47 =
  7. 7.53 + 16 + 71 + 84 =
  8. 8.22 + 14 + 88 + 86 =
  9. 9.89 + 44 + 73 + 85 =
  10. 10.66 + 51 + 26 + 51 =
  11. 11.64 + 87 + 63 + 68 =
  12. 12.16 + 71 + 63 + 41 =
  13. 13.82 + 17 + 58 + 38 =
  14. 14.69 + 41 + 29 + 66 =
  15. 15.70 + 64 + 85 + 62 =
  16. 16.47 + 89 + 52 + 44 =
  17. 17.53 + 75 + 86 + 16 =
  18. 18.25 + 30 + 31 + 21 =
  19. 19.49 + 73 + 27 + 62 =
  20. 20.24 + 30 + 67 + 65 =
  21. 21.78 + 62 + 39 + 41 =
  22. 22.88 + 61 + 15 + 31 =
  23. 23.80 + 38 + 82 + 72 =
  24. 24.53 + 55 + 27 + 27 =
  25. 25.62 + 19 + 54 + 69 =
  26. 26.49 + 86 + 79 + 50 =
  27. 27.47 + 26 + 42 + 23 =
  28. 28.22 + 38 + 18 + 28 =
  29. 29.75 + 71 + 29 + 43 =
  30. 30.30 + 31 + 48 + 48 =
  31. 31.59 + 33 + 48 + 80 =
  32. 32.17 + 74 + 59 + 59 =
  33. 33.43 + 80 + 23 + 83 =
  34. 34.62 + 54 + 85 + 25 =
  35. 35.15 + 89 + 78 + 49 =
  36. 36.55 + 64 + 80 + 79 =
  37. 37.63 + 29 + 39 + 14 =
  38. 38.33 + 26 + 16 + 65 =
  39. 39.58 + 63 + 17 + 63 =
  40. 40.29 + 78 + 20 + 50 =

Answer key

  1. 172
  2. 240
  3. 240
  4. 178
  5. 263
  6. 127
  7. 224
  8. 210
  9. 291
  10. 194
  11. 282
  12. 191
  13. 195
  14. 205
  15. 281
  16. 232
  17. 230
  18. 107
  19. 211
  20. 186
  21. 220
  22. 195
  23. 272
  24. 162
  25. 204
  26. 264
  27. 138
  28. 106
  29. 218
  30. 157
  31. 220
  32. 209
  33. 229
  34. 226
  35. 231
  36. 278
  37. 145
  38. 140
  39. 201
  40. 177

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