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Mental Addition Worksheet

Speed calculation lesson 5: Running totals · Set 49 · 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. 1.77 + 42 + 75 + 60 =
  2. 2.75 + 64 + 36 + 77 =
  3. 3.29 + 79 + 46 + 45 =
  4. 4.56 + 79 + 55 + 57 =
  5. 5.49 + 41 + 81 + 14 =
  6. 6.70 + 82 + 86 + 73 =
  7. 7.58 + 25 + 22 + 33 =
  8. 8.56 + 81 + 58 + 85 =
  9. 9.62 + 34 + 68 + 79 =
  10. 10.35 + 44 + 42 + 86 =
  11. 11.67 + 84 + 44 + 27 =
  12. 12.30 + 42 + 16 + 40 =
  13. 13.85 + 27 + 39 + 66 =
  14. 14.35 + 14 + 19 + 16 =
  15. 15.31 + 73 + 74 + 14 =
  16. 16.31 + 35 + 30 + 41 =
  17. 17.67 + 11 + 74 + 77 =
  18. 18.41 + 61 + 71 + 35 =
  19. 19.75 + 30 + 25 + 28 =
  20. 20.33 + 16 + 84 + 15 =
  21. 21.64 + 76 + 46 + 89 =
  22. 22.81 + 87 + 49 + 75 =
  23. 23.61 + 24 + 12 + 52 =
  24. 24.32 + 74 + 53 + 32 =
  25. 25.80 + 12 + 30 + 13 =
  26. 26.20 + 52 + 11 + 39 =
  27. 27.44 + 32 + 62 + 87 =
  28. 28.17 + 28 + 43 + 64 =
  29. 29.43 + 47 + 29 + 63 =
  30. 30.37 + 76 + 22 + 37 =
  31. 31.62 + 52 + 25 + 81 =
  32. 32.21 + 41 + 63 + 68 =
  33. 33.58 + 24 + 42 + 67 =
  34. 34.84 + 46 + 45 + 14 =
  35. 35.31 + 72 + 57 + 79 =
  36. 36.53 + 68 + 17 + 72 =
  37. 37.56 + 32 + 32 + 82 =
  38. 38.46 + 54 + 88 + 22 =
  39. 39.78 + 84 + 85 + 79 =
  40. 40.50 + 56 + 43 + 63 =

Answer key

  1. 254
  2. 252
  3. 199
  4. 247
  5. 185
  6. 311
  7. 138
  8. 280
  9. 243
  10. 207
  11. 222
  12. 128
  13. 217
  14. 84
  15. 192
  16. 137
  17. 229
  18. 208
  19. 158
  20. 148
  21. 275
  22. 292
  23. 149
  24. 191
  25. 135
  26. 122
  27. 225
  28. 152
  29. 182
  30. 172
  31. 220
  32. 193
  33. 191
  34. 189
  35. 239
  36. 210
  37. 202
  38. 210
  39. 326
  40. 212

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