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Mental Addition Worksheet

Speed calculation lesson 5: Running totals · Set 322 · 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. 1.25 + 28 + 22 + 27 =
  2. 2.73 + 58 + 77 + 69 =
  3. 3.61 + 12 + 43 + 53 =
  4. 4.21 + 28 + 66 + 26 =
  5. 5.12 + 12 + 33 + 20 =
  6. 6.13 + 46 + 71 + 62 =
  7. 7.22 + 45 + 83 + 15 =
  8. 8.21 + 70 + 84 + 75 =
  9. 9.88 + 55 + 68 + 74 =
  10. 10.72 + 22 + 62 + 20 =
  11. 11.27 + 73 + 11 + 78 =
  12. 12.57 + 88 + 73 + 79 =
  13. 13.19 + 31 + 26 + 37 =
  14. 14.53 + 29 + 70 + 22 =
  15. 15.51 + 52 + 48 + 78 =
  16. 16.50 + 76 + 28 + 45 =
  17. 17.31 + 61 + 86 + 32 =
  18. 18.34 + 15 + 43 + 38 =
  19. 19.87 + 59 + 69 + 47 =
  20. 20.23 + 32 + 48 + 49 =
  21. 21.59 + 79 + 37 + 79 =
  22. 22.77 + 79 + 33 + 37 =
  23. 23.87 + 19 + 32 + 11 =
  24. 24.31 + 38 + 56 + 69 =
  25. 25.47 + 21 + 75 + 88 =
  26. 26.28 + 70 + 60 + 32 =
  27. 27.71 + 43 + 34 + 20 =
  28. 28.58 + 20 + 58 + 17 =
  29. 29.26 + 29 + 85 + 71 =
  30. 30.66 + 59 + 29 + 40 =
  31. 31.26 + 50 + 26 + 49 =
  32. 32.60 + 80 + 22 + 52 =
  33. 33.30 + 22 + 23 + 50 =
  34. 34.65 + 24 + 18 + 51 =
  35. 35.28 + 84 + 69 + 57 =
  36. 36.63 + 57 + 70 + 13 =
  37. 37.81 + 29 + 76 + 78 =
  38. 38.73 + 16 + 59 + 41 =
  39. 39.12 + 12 + 14 + 11 =
  40. 40.63 + 78 + 72 + 70 =

Answer key

  1. 102
  2. 277
  3. 169
  4. 141
  5. 77
  6. 192
  7. 165
  8. 250
  9. 285
  10. 176
  11. 189
  12. 297
  13. 113
  14. 174
  15. 229
  16. 199
  17. 210
  18. 130
  19. 262
  20. 152
  21. 254
  22. 226
  23. 149
  24. 194
  25. 231
  26. 190
  27. 168
  28. 153
  29. 211
  30. 194
  31. 151
  32. 214
  33. 125
  34. 158
  35. 238
  36. 203
  37. 264
  38. 189
  39. 49
  40. 283

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