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Mental Addition Worksheet

Speed calculation lesson 5: Running totals · Set 13 · 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. 1.89 + 67 + 77 + 81 =
  2. 2.23 + 22 + 60 + 23 =
  3. 3.28 + 25 + 25 + 22 =
  4. 4.53 + 78 + 32 + 35 =
  5. 5.58 + 59 + 40 + 51 =
  6. 6.25 + 60 + 30 + 42 =
  7. 7.79 + 71 + 52 + 26 =
  8. 8.15 + 88 + 46 + 29 =
  9. 9.65 + 84 + 82 + 45 =
  10. 10.35 + 70 + 47 + 65 =
  11. 11.89 + 79 + 66 + 58 =
  12. 12.54 + 64 + 84 + 13 =
  13. 13.45 + 83 + 84 + 65 =
  14. 14.18 + 72 + 22 + 26 =
  15. 15.49 + 19 + 61 + 50 =
  16. 16.80 + 23 + 80 + 58 =
  17. 17.70 + 83 + 33 + 31 =
  18. 18.62 + 21 + 87 + 88 =
  19. 19.88 + 46 + 72 + 37 =
  20. 20.86 + 16 + 37 + 42 =
  21. 21.60 + 42 + 18 + 59 =
  22. 22.35 + 56 + 63 + 58 =
  23. 23.83 + 18 + 56 + 72 =
  24. 24.27 + 14 + 23 + 21 =
  25. 25.36 + 73 + 18 + 42 =
  26. 26.81 + 68 + 70 + 32 =
  27. 27.43 + 75 + 48 + 55 =
  28. 28.77 + 39 + 49 + 57 =
  29. 29.74 + 86 + 56 + 82 =
  30. 30.63 + 33 + 80 + 49 =
  31. 31.34 + 82 + 44 + 26 =
  32. 32.30 + 83 + 49 + 30 =
  33. 33.63 + 29 + 12 + 89 =
  34. 34.51 + 60 + 49 + 45 =
  35. 35.20 + 24 + 11 + 14 =
  36. 36.88 + 23 + 36 + 53 =
  37. 37.60 + 65 + 34 + 40 =
  38. 38.66 + 35 + 53 + 67 =
  39. 39.31 + 20 + 50 + 43 =
  40. 40.72 + 30 + 13 + 32 =

Answer key

  1. 314
  2. 128
  3. 100
  4. 198
  5. 208
  6. 157
  7. 228
  8. 178
  9. 276
  10. 217
  11. 292
  12. 215
  13. 277
  14. 138
  15. 179
  16. 241
  17. 217
  18. 258
  19. 243
  20. 181
  21. 179
  22. 212
  23. 229
  24. 85
  25. 169
  26. 251
  27. 221
  28. 222
  29. 298
  30. 225
  31. 186
  32. 192
  33. 193
  34. 205
  35. 69
  36. 200
  37. 199
  38. 221
  39. 144
  40. 147

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