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Mental Addition Worksheet

Speed calculation lesson 5: Running totals · Set 459 · 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. 1.70 + 50 + 37 + 22 =
  2. 2.31 + 25 + 31 + 63 =
  3. 3.38 + 60 + 20 + 33 =
  4. 4.35 + 38 + 23 + 78 =
  5. 5.70 + 18 + 53 + 36 =
  6. 6.80 + 29 + 31 + 16 =
  7. 7.68 + 36 + 21 + 59 =
  8. 8.84 + 13 + 85 + 54 =
  9. 9.53 + 25 + 75 + 28 =
  10. 10.57 + 45 + 17 + 20 =
  11. 11.65 + 27 + 64 + 60 =
  12. 12.24 + 56 + 42 + 16 =
  13. 13.30 + 13 + 23 + 13 =
  14. 14.33 + 19 + 63 + 76 =
  15. 15.34 + 53 + 19 + 19 =
  16. 16.50 + 72 + 85 + 82 =
  17. 17.88 + 53 + 44 + 55 =
  18. 18.27 + 32 + 52 + 14 =
  19. 19.35 + 78 + 65 + 34 =
  20. 20.46 + 20 + 40 + 27 =
  21. 21.11 + 77 + 55 + 56 =
  22. 22.23 + 30 + 55 + 82 =
  23. 23.50 + 75 + 41 + 20 =
  24. 24.17 + 37 + 15 + 46 =
  25. 25.69 + 45 + 86 + 50 =
  26. 26.22 + 45 + 50 + 16 =
  27. 27.82 + 20 + 23 + 25 =
  28. 28.71 + 31 + 66 + 39 =
  29. 29.86 + 35 + 58 + 75 =
  30. 30.42 + 20 + 29 + 32 =
  31. 31.24 + 51 + 65 + 89 =
  32. 32.12 + 28 + 28 + 73 =
  33. 33.70 + 19 + 17 + 65 =
  34. 34.58 + 56 + 14 + 17 =
  35. 35.24 + 40 + 68 + 62 =
  36. 36.80 + 19 + 47 + 79 =
  37. 37.25 + 80 + 53 + 50 =
  38. 38.20 + 77 + 50 + 76 =
  39. 39.21 + 24 + 44 + 43 =
  40. 40.29 + 21 + 86 + 59 =

Answer key

  1. 179
  2. 150
  3. 151
  4. 174
  5. 177
  6. 156
  7. 184
  8. 236
  9. 181
  10. 139
  11. 216
  12. 138
  13. 79
  14. 191
  15. 125
  16. 289
  17. 240
  18. 125
  19. 212
  20. 133
  21. 199
  22. 190
  23. 186
  24. 115
  25. 250
  26. 133
  27. 150
  28. 207
  29. 254
  30. 123
  31. 229
  32. 141
  33. 171
  34. 145
  35. 194
  36. 225
  37. 208
  38. 223
  39. 132
  40. 195

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