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Mental Addition Worksheet

Speed calculation lesson 5: Running totals · Set 600 · 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. 1.45 + 65 + 24 + 23 =
  2. 2.69 + 86 + 45 + 33 =
  3. 3.87 + 68 + 18 + 60 =
  4. 4.28 + 39 + 78 + 58 =
  5. 5.49 + 25 + 57 + 89 =
  6. 6.36 + 50 + 49 + 37 =
  7. 7.81 + 48 + 27 + 86 =
  8. 8.14 + 35 + 60 + 22 =
  9. 9.60 + 17 + 26 + 20 =
  10. 10.40 + 33 + 32 + 30 =
  11. 11.88 + 45 + 13 + 38 =
  12. 12.85 + 88 + 52 + 51 =
  13. 13.57 + 55 + 79 + 25 =
  14. 14.56 + 58 + 78 + 31 =
  15. 15.77 + 78 + 59 + 28 =
  16. 16.88 + 25 + 59 + 52 =
  17. 17.74 + 22 + 71 + 31 =
  18. 18.41 + 15 + 14 + 17 =
  19. 19.48 + 68 + 69 + 39 =
  20. 20.15 + 72 + 46 + 76 =
  21. 21.40 + 36 + 25 + 85 =
  22. 22.70 + 14 + 71 + 50 =
  23. 23.30 + 35 + 46 + 81 =
  24. 24.32 + 16 + 70 + 46 =
  25. 25.70 + 45 + 89 + 88 =
  26. 26.81 + 47 + 25 + 65 =
  27. 27.85 + 14 + 65 + 60 =
  28. 28.43 + 22 + 51 + 26 =
  29. 29.50 + 76 + 35 + 81 =
  30. 30.29 + 82 + 69 + 61 =
  31. 31.57 + 52 + 36 + 31 =
  32. 32.14 + 15 + 54 + 87 =
  33. 33.14 + 12 + 57 + 63 =
  34. 34.75 + 20 + 47 + 38 =
  35. 35.49 + 40 + 33 + 79 =
  36. 36.40 + 33 + 80 + 12 =
  37. 37.43 + 36 + 63 + 72 =
  38. 38.63 + 78 + 34 + 60 =
  39. 39.41 + 64 + 57 + 47 =
  40. 40.16 + 65 + 12 + 44 =

Answer key

  1. 157
  2. 233
  3. 233
  4. 203
  5. 220
  6. 172
  7. 242
  8. 131
  9. 123
  10. 135
  11. 184
  12. 276
  13. 216
  14. 223
  15. 242
  16. 224
  17. 198
  18. 87
  19. 224
  20. 209
  21. 186
  22. 205
  23. 192
  24. 164
  25. 292
  26. 218
  27. 224
  28. 142
  29. 242
  30. 241
  31. 176
  32. 170
  33. 146
  34. 180
  35. 201
  36. 165
  37. 214
  38. 235
  39. 209
  40. 137

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