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Mental Addition Worksheet

Speed calculation lesson 5: Running totals · Set 632 · 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. 1.56 + 28 + 51 + 61 =
  2. 2.34 + 73 + 22 + 42 =
  3. 3.23 + 28 + 31 + 31 =
  4. 4.26 + 66 + 68 + 30 =
  5. 5.86 + 87 + 83 + 75 =
  6. 6.36 + 78 + 55 + 38 =
  7. 7.17 + 38 + 88 + 24 =
  8. 8.37 + 21 + 25 + 30 =
  9. 9.33 + 29 + 48 + 72 =
  10. 10.85 + 20 + 72 + 68 =
  11. 11.55 + 58 + 53 + 43 =
  12. 12.35 + 27 + 69 + 19 =
  13. 13.26 + 72 + 64 + 34 =
  14. 14.32 + 31 + 79 + 73 =
  15. 15.70 + 83 + 58 + 21 =
  16. 16.35 + 12 + 32 + 25 =
  17. 17.40 + 23 + 25 + 46 =
  18. 18.25 + 83 + 23 + 64 =
  19. 19.86 + 38 + 82 + 77 =
  20. 20.80 + 32 + 78 + 78 =
  21. 21.25 + 61 + 77 + 73 =
  22. 22.32 + 20 + 29 + 44 =
  23. 23.20 + 71 + 35 + 57 =
  24. 24.83 + 56 + 66 + 36 =
  25. 25.47 + 74 + 85 + 37 =
  26. 26.53 + 60 + 77 + 14 =
  27. 27.23 + 61 + 89 + 80 =
  28. 28.52 + 87 + 30 + 67 =
  29. 29.63 + 48 + 46 + 58 =
  30. 30.83 + 22 + 82 + 76 =
  31. 31.74 + 77 + 48 + 87 =
  32. 32.34 + 59 + 58 + 35 =
  33. 33.83 + 32 + 28 + 26 =
  34. 34.64 + 34 + 63 + 89 =
  35. 35.48 + 40 + 16 + 29 =
  36. 36.46 + 12 + 38 + 42 =
  37. 37.46 + 49 + 23 + 11 =
  38. 38.87 + 18 + 73 + 34 =
  39. 39.35 + 37 + 48 + 45 =
  40. 40.45 + 74 + 32 + 22 =

Answer key

  1. 196
  2. 171
  3. 113
  4. 190
  5. 331
  6. 207
  7. 167
  8. 113
  9. 182
  10. 245
  11. 209
  12. 150
  13. 196
  14. 215
  15. 232
  16. 104
  17. 134
  18. 195
  19. 283
  20. 268
  21. 236
  22. 125
  23. 183
  24. 241
  25. 243
  26. 204
  27. 253
  28. 236
  29. 215
  30. 263
  31. 286
  32. 186
  33. 169
  34. 250
  35. 133
  36. 138
  37. 129
  38. 212
  39. 165
  40. 173

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