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Mental Addition Worksheet

Speed calculation lesson 5: Running totals · Set 454 · 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. 1.47 + 39 + 11 + 63 =
  2. 2.12 + 19 + 16 + 76 =
  3. 3.32 + 64 + 81 + 30 =
  4. 4.50 + 40 + 61 + 23 =
  5. 5.30 + 69 + 50 + 13 =
  6. 6.43 + 11 + 74 + 27 =
  7. 7.18 + 61 + 12 + 24 =
  8. 8.20 + 20 + 48 + 87 =
  9. 9.39 + 25 + 57 + 13 =
  10. 10.16 + 76 + 81 + 28 =
  11. 11.19 + 14 + 53 + 84 =
  12. 12.56 + 27 + 73 + 81 =
  13. 13.85 + 33 + 35 + 67 =
  14. 14.35 + 68 + 29 + 85 =
  15. 15.47 + 32 + 14 + 72 =
  16. 16.72 + 35 + 71 + 89 =
  17. 17.54 + 29 + 39 + 60 =
  18. 18.44 + 24 + 72 + 23 =
  19. 19.89 + 15 + 34 + 20 =
  20. 20.15 + 34 + 36 + 89 =
  21. 21.11 + 43 + 31 + 15 =
  22. 22.56 + 74 + 46 + 46 =
  23. 23.65 + 85 + 27 + 21 =
  24. 24.29 + 24 + 63 + 66 =
  25. 25.56 + 18 + 43 + 46 =
  26. 26.72 + 60 + 76 + 71 =
  27. 27.79 + 11 + 53 + 33 =
  28. 28.14 + 56 + 40 + 81 =
  29. 29.85 + 22 + 34 + 60 =
  30. 30.32 + 76 + 40 + 54 =
  31. 31.35 + 27 + 67 + 88 =
  32. 32.34 + 66 + 56 + 49 =
  33. 33.72 + 88 + 21 + 60 =
  34. 34.65 + 64 + 89 + 37 =
  35. 35.14 + 83 + 23 + 80 =
  36. 36.59 + 68 + 26 + 87 =
  37. 37.81 + 60 + 65 + 39 =
  38. 38.26 + 24 + 39 + 12 =
  39. 39.68 + 36 + 37 + 31 =
  40. 40.20 + 28 + 86 + 55 =

Answer key

  1. 160
  2. 123
  3. 207
  4. 174
  5. 162
  6. 155
  7. 115
  8. 175
  9. 134
  10. 201
  11. 170
  12. 237
  13. 220
  14. 217
  15. 165
  16. 267
  17. 182
  18. 163
  19. 158
  20. 174
  21. 100
  22. 222
  23. 198
  24. 182
  25. 163
  26. 279
  27. 176
  28. 191
  29. 201
  30. 202
  31. 217
  32. 205
  33. 241
  34. 255
  35. 200
  36. 240
  37. 245
  38. 101
  39. 172
  40. 189

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