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Mental Addition Worksheet

Speed calculation lesson 5: Running totals · Set 136 · 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. 1.42 + 52 + 79 + 87 =
  2. 2.38 + 28 + 58 + 49 =
  3. 3.14 + 38 + 56 + 29 =
  4. 4.43 + 12 + 14 + 88 =
  5. 5.89 + 29 + 65 + 39 =
  6. 6.39 + 85 + 47 + 39 =
  7. 7.60 + 31 + 41 + 43 =
  8. 8.31 + 36 + 51 + 70 =
  9. 9.52 + 35 + 41 + 76 =
  10. 10.46 + 43 + 27 + 25 =
  11. 11.14 + 22 + 66 + 22 =
  12. 12.17 + 15 + 82 + 69 =
  13. 13.40 + 26 + 77 + 85 =
  14. 14.13 + 71 + 28 + 29 =
  15. 15.65 + 54 + 78 + 19 =
  16. 16.23 + 66 + 89 + 16 =
  17. 17.56 + 79 + 50 + 25 =
  18. 18.16 + 56 + 67 + 28 =
  19. 19.42 + 53 + 40 + 48 =
  20. 20.22 + 27 + 14 + 70 =
  21. 21.45 + 41 + 29 + 78 =
  22. 22.52 + 75 + 30 + 46 =
  23. 23.69 + 33 + 75 + 22 =
  24. 24.60 + 82 + 63 + 63 =
  25. 25.33 + 87 + 49 + 48 =
  26. 26.12 + 85 + 44 + 29 =
  27. 27.76 + 83 + 21 + 33 =
  28. 28.39 + 72 + 60 + 33 =
  29. 29.21 + 86 + 72 + 19 =
  30. 30.16 + 21 + 52 + 30 =
  31. 31.53 + 48 + 71 + 88 =
  32. 32.60 + 86 + 45 + 35 =
  33. 33.78 + 27 + 26 + 76 =
  34. 34.17 + 74 + 23 + 32 =
  35. 35.56 + 89 + 28 + 23 =
  36. 36.29 + 46 + 48 + 39 =
  37. 37.75 + 85 + 43 + 34 =
  38. 38.83 + 73 + 25 + 73 =
  39. 39.49 + 73 + 44 + 88 =
  40. 40.79 + 31 + 52 + 40 =

Answer key

  1. 260
  2. 173
  3. 137
  4. 157
  5. 222
  6. 210
  7. 175
  8. 188
  9. 204
  10. 141
  11. 124
  12. 183
  13. 228
  14. 141
  15. 216
  16. 194
  17. 210
  18. 167
  19. 183
  20. 133
  21. 193
  22. 203
  23. 199
  24. 268
  25. 217
  26. 170
  27. 213
  28. 204
  29. 198
  30. 119
  31. 260
  32. 226
  33. 207
  34. 146
  35. 196
  36. 162
  37. 237
  38. 254
  39. 254
  40. 202

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