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Mental Addition Worksheet

Speed calculation lesson 5: Running totals · Set 211 · 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. 1.16 + 42 + 58 + 53 =
  2. 2.52 + 52 + 26 + 34 =
  3. 3.32 + 43 + 81 + 30 =
  4. 4.46 + 28 + 50 + 16 =
  5. 5.65 + 60 + 83 + 13 =
  6. 6.36 + 83 + 31 + 88 =
  7. 7.42 + 86 + 75 + 41 =
  8. 8.14 + 79 + 67 + 30 =
  9. 9.72 + 44 + 18 + 65 =
  10. 10.45 + 63 + 66 + 45 =
  11. 11.69 + 31 + 18 + 32 =
  12. 12.62 + 70 + 44 + 22 =
  13. 13.65 + 70 + 34 + 61 =
  14. 14.61 + 71 + 87 + 37 =
  15. 15.74 + 82 + 88 + 11 =
  16. 16.54 + 37 + 39 + 23 =
  17. 17.71 + 21 + 29 + 28 =
  18. 18.50 + 12 + 27 + 79 =
  19. 19.33 + 25 + 57 + 36 =
  20. 20.80 + 15 + 60 + 39 =
  21. 21.14 + 36 + 19 + 30 =
  22. 22.37 + 17 + 84 + 17 =
  23. 23.32 + 21 + 82 + 73 =
  24. 24.88 + 30 + 89 + 43 =
  25. 25.55 + 77 + 14 + 68 =
  26. 26.14 + 26 + 31 + 40 =
  27. 27.79 + 71 + 69 + 69 =
  28. 28.88 + 88 + 57 + 15 =
  29. 29.73 + 21 + 64 + 51 =
  30. 30.67 + 28 + 25 + 55 =
  31. 31.65 + 85 + 72 + 19 =
  32. 32.11 + 62 + 29 + 70 =
  33. 33.27 + 64 + 30 + 30 =
  34. 34.80 + 64 + 12 + 32 =
  35. 35.71 + 16 + 81 + 79 =
  36. 36.58 + 55 + 32 + 16 =
  37. 37.62 + 79 + 48 + 67 =
  38. 38.76 + 21 + 43 + 32 =
  39. 39.47 + 56 + 53 + 59 =
  40. 40.64 + 22 + 88 + 85 =

Answer key

  1. 169
  2. 164
  3. 186
  4. 140
  5. 221
  6. 238
  7. 244
  8. 190
  9. 199
  10. 219
  11. 150
  12. 198
  13. 230
  14. 256
  15. 255
  16. 153
  17. 149
  18. 168
  19. 151
  20. 194
  21. 99
  22. 155
  23. 208
  24. 250
  25. 214
  26. 111
  27. 288
  28. 248
  29. 209
  30. 175
  31. 241
  32. 172
  33. 151
  34. 188
  35. 247
  36. 161
  37. 256
  38. 172
  39. 215
  40. 259

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