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Mental Addition Worksheet

Speed calculation lesson 5: Running totals · Set 664 · 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. 1.72 + 77 + 11 + 19 =
  2. 2.71 + 64 + 89 + 55 =
  3. 3.24 + 51 + 59 + 41 =
  4. 4.15 + 68 + 19 + 44 =
  5. 5.15 + 63 + 54 + 15 =
  6. 6.24 + 16 + 63 + 45 =
  7. 7.69 + 39 + 45 + 57 =
  8. 8.22 + 81 + 86 + 18 =
  9. 9.47 + 34 + 51 + 41 =
  10. 10.38 + 28 + 88 + 50 =
  11. 11.27 + 13 + 48 + 42 =
  12. 12.55 + 45 + 51 + 76 =
  13. 13.34 + 43 + 13 + 71 =
  14. 14.40 + 22 + 25 + 22 =
  15. 15.43 + 23 + 39 + 27 =
  16. 16.61 + 51 + 38 + 49 =
  17. 17.42 + 87 + 21 + 51 =
  18. 18.72 + 41 + 37 + 86 =
  19. 19.58 + 71 + 50 + 15 =
  20. 20.15 + 28 + 54 + 76 =
  21. 21.70 + 36 + 54 + 54 =
  22. 22.68 + 48 + 11 + 64 =
  23. 23.15 + 21 + 69 + 62 =
  24. 24.42 + 28 + 86 + 47 =
  25. 25.21 + 18 + 31 + 35 =
  26. 26.88 + 54 + 26 + 70 =
  27. 27.27 + 21 + 42 + 56 =
  28. 28.19 + 54 + 80 + 81 =
  29. 29.18 + 13 + 12 + 48 =
  30. 30.19 + 61 + 28 + 30 =
  31. 31.84 + 20 + 33 + 59 =
  32. 32.51 + 67 + 19 + 15 =
  33. 33.46 + 35 + 19 + 20 =
  34. 34.28 + 48 + 58 + 73 =
  35. 35.80 + 24 + 84 + 53 =
  36. 36.43 + 40 + 36 + 39 =
  37. 37.48 + 82 + 83 + 65 =
  38. 38.20 + 31 + 12 + 25 =
  39. 39.30 + 62 + 30 + 72 =
  40. 40.83 + 76 + 72 + 18 =

Answer key

  1. 179
  2. 279
  3. 175
  4. 146
  5. 147
  6. 148
  7. 210
  8. 207
  9. 173
  10. 204
  11. 130
  12. 227
  13. 161
  14. 109
  15. 132
  16. 199
  17. 201
  18. 236
  19. 194
  20. 173
  21. 214
  22. 191
  23. 167
  24. 203
  25. 105
  26. 238
  27. 146
  28. 234
  29. 91
  30. 138
  31. 196
  32. 152
  33. 120
  34. 207
  35. 241
  36. 158
  37. 278
  38. 88
  39. 194
  40. 249

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