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Mental Addition Worksheet

Speed calculation lesson 5: Running totals · Set 495 · 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. 1.17 + 27 + 81 + 87 =
  2. 2.89 + 24 + 22 + 39 =
  3. 3.37 + 16 + 59 + 86 =
  4. 4.82 + 28 + 58 + 87 =
  5. 5.44 + 78 + 43 + 35 =
  6. 6.77 + 34 + 43 + 79 =
  7. 7.72 + 80 + 75 + 33 =
  8. 8.59 + 11 + 43 + 22 =
  9. 9.17 + 89 + 77 + 71 =
  10. 10.22 + 66 + 43 + 11 =
  11. 11.63 + 89 + 71 + 42 =
  12. 12.79 + 74 + 34 + 17 =
  13. 13.74 + 40 + 18 + 58 =
  14. 14.30 + 70 + 86 + 65 =
  15. 15.26 + 61 + 40 + 75 =
  16. 16.21 + 20 + 56 + 63 =
  17. 17.61 + 15 + 21 + 87 =
  18. 18.45 + 78 + 42 + 61 =
  19. 19.13 + 50 + 29 + 65 =
  20. 20.38 + 54 + 39 + 75 =
  21. 21.59 + 64 + 36 + 27 =
  22. 22.18 + 31 + 61 + 42 =
  23. 23.53 + 88 + 11 + 48 =
  24. 24.64 + 20 + 68 + 11 =
  25. 25.20 + 62 + 51 + 84 =
  26. 26.68 + 73 + 71 + 86 =
  27. 27.47 + 49 + 82 + 23 =
  28. 28.41 + 31 + 35 + 87 =
  29. 29.19 + 32 + 67 + 60 =
  30. 30.22 + 11 + 62 + 82 =
  31. 31.48 + 74 + 84 + 28 =
  32. 32.70 + 13 + 17 + 55 =
  33. 33.77 + 28 + 59 + 47 =
  34. 34.50 + 79 + 37 + 64 =
  35. 35.86 + 85 + 68 + 25 =
  36. 36.86 + 65 + 54 + 49 =
  37. 37.70 + 31 + 38 + 37 =
  38. 38.15 + 84 + 32 + 67 =
  39. 39.22 + 12 + 49 + 24 =
  40. 40.80 + 82 + 21 + 27 =

Answer key

  1. 212
  2. 174
  3. 198
  4. 255
  5. 200
  6. 233
  7. 260
  8. 135
  9. 254
  10. 142
  11. 265
  12. 204
  13. 190
  14. 251
  15. 202
  16. 160
  17. 184
  18. 226
  19. 157
  20. 206
  21. 186
  22. 152
  23. 200
  24. 163
  25. 217
  26. 298
  27. 201
  28. 194
  29. 178
  30. 177
  31. 234
  32. 155
  33. 211
  34. 230
  35. 264
  36. 254
  37. 176
  38. 198
  39. 107
  40. 210

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