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Mental Addition Worksheet

Speed calculation lesson 5: Running totals · Set 75 · 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. 1.80 + 66 + 43 + 38 =
  2. 2.86 + 69 + 41 + 35 =
  3. 3.33 + 57 + 17 + 60 =
  4. 4.88 + 36 + 66 + 30 =
  5. 5.51 + 86 + 56 + 84 =
  6. 6.65 + 30 + 87 + 32 =
  7. 7.51 + 25 + 85 + 16 =
  8. 8.64 + 20 + 14 + 42 =
  9. 9.82 + 19 + 43 + 14 =
  10. 10.32 + 11 + 19 + 87 =
  11. 11.44 + 54 + 35 + 80 =
  12. 12.77 + 33 + 66 + 48 =
  13. 13.64 + 41 + 53 + 77 =
  14. 14.55 + 25 + 60 + 89 =
  15. 15.32 + 42 + 65 + 32 =
  16. 16.86 + 22 + 32 + 63 =
  17. 17.89 + 19 + 33 + 34 =
  18. 18.48 + 26 + 81 + 32 =
  19. 19.75 + 74 + 23 + 76 =
  20. 20.30 + 53 + 22 + 18 =
  21. 21.36 + 12 + 76 + 79 =
  22. 22.33 + 58 + 56 + 64 =
  23. 23.29 + 73 + 50 + 61 =
  24. 24.17 + 71 + 41 + 65 =
  25. 25.78 + 42 + 15 + 65 =
  26. 26.24 + 25 + 24 + 44 =
  27. 27.71 + 54 + 21 + 39 =
  28. 28.66 + 16 + 19 + 14 =
  29. 29.23 + 64 + 30 + 55 =
  30. 30.14 + 45 + 19 + 76 =
  31. 31.15 + 14 + 58 + 17 =
  32. 32.25 + 81 + 60 + 37 =
  33. 33.86 + 85 + 17 + 35 =
  34. 34.49 + 34 + 20 + 43 =
  35. 35.76 + 85 + 57 + 28 =
  36. 36.19 + 57 + 53 + 71 =
  37. 37.30 + 52 + 63 + 42 =
  38. 38.55 + 78 + 11 + 89 =
  39. 39.51 + 55 + 59 + 28 =
  40. 40.43 + 58 + 42 + 84 =

Answer key

  1. 227
  2. 231
  3. 167
  4. 220
  5. 277
  6. 214
  7. 177
  8. 140
  9. 158
  10. 149
  11. 213
  12. 224
  13. 235
  14. 229
  15. 171
  16. 203
  17. 175
  18. 187
  19. 248
  20. 123
  21. 203
  22. 211
  23. 213
  24. 194
  25. 200
  26. 117
  27. 185
  28. 115
  29. 172
  30. 154
  31. 104
  32. 203
  33. 223
  34. 146
  35. 246
  36. 200
  37. 187
  38. 233
  39. 193
  40. 227

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