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Mental Addition Worksheet

Speed calculation lesson 5: Running totals · Set 641 · 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. 1.73 + 19 + 33 + 34 =
  2. 2.42 + 34 + 51 + 34 =
  3. 3.68 + 84 + 52 + 61 =
  4. 4.15 + 34 + 55 + 40 =
  5. 5.32 + 60 + 74 + 15 =
  6. 6.20 + 23 + 52 + 24 =
  7. 7.14 + 18 + 17 + 43 =
  8. 8.75 + 15 + 78 + 87 =
  9. 9.37 + 64 + 74 + 66 =
  10. 10.85 + 69 + 85 + 47 =
  11. 11.69 + 22 + 72 + 62 =
  12. 12.13 + 24 + 79 + 12 =
  13. 13.43 + 14 + 23 + 47 =
  14. 14.53 + 85 + 60 + 24 =
  15. 15.55 + 48 + 64 + 41 =
  16. 16.40 + 83 + 68 + 18 =
  17. 17.19 + 54 + 85 + 85 =
  18. 18.61 + 48 + 72 + 78 =
  19. 19.48 + 25 + 83 + 61 =
  20. 20.88 + 50 + 22 + 35 =
  21. 21.74 + 51 + 39 + 36 =
  22. 22.58 + 20 + 74 + 39 =
  23. 23.40 + 26 + 70 + 27 =
  24. 24.27 + 38 + 81 + 16 =
  25. 25.26 + 26 + 51 + 21 =
  26. 26.64 + 54 + 22 + 29 =
  27. 27.23 + 40 + 64 + 87 =
  28. 28.64 + 12 + 64 + 46 =
  29. 29.15 + 75 + 75 + 19 =
  30. 30.88 + 45 + 16 + 14 =
  31. 31.42 + 67 + 58 + 86 =
  32. 32.81 + 43 + 72 + 34 =
  33. 33.11 + 75 + 46 + 26 =
  34. 34.12 + 29 + 69 + 32 =
  35. 35.61 + 20 + 73 + 28 =
  36. 36.16 + 33 + 41 + 31 =
  37. 37.23 + 30 + 67 + 11 =
  38. 38.16 + 32 + 85 + 71 =
  39. 39.50 + 42 + 49 + 63 =
  40. 40.78 + 17 + 59 + 81 =

Answer key

  1. 159
  2. 161
  3. 265
  4. 144
  5. 181
  6. 119
  7. 92
  8. 255
  9. 241
  10. 286
  11. 225
  12. 128
  13. 127
  14. 222
  15. 208
  16. 209
  17. 243
  18. 259
  19. 217
  20. 195
  21. 200
  22. 191
  23. 163
  24. 162
  25. 124
  26. 169
  27. 214
  28. 186
  29. 184
  30. 163
  31. 253
  32. 230
  33. 158
  34. 142
  35. 182
  36. 121
  37. 131
  38. 204
  39. 204
  40. 235

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