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Mental Addition Worksheet

Speed calculation lesson 5: Running totals · Set 308 · 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. 1.46 + 15 + 26 + 45 =
  2. 2.60 + 29 + 18 + 76 =
  3. 3.74 + 26 + 14 + 67 =
  4. 4.43 + 83 + 67 + 57 =
  5. 5.47 + 27 + 22 + 71 =
  6. 6.73 + 55 + 44 + 45 =
  7. 7.63 + 22 + 49 + 12 =
  8. 8.18 + 32 + 81 + 19 =
  9. 9.11 + 60 + 50 + 20 =
  10. 10.17 + 67 + 68 + 87 =
  11. 11.43 + 71 + 81 + 37 =
  12. 12.60 + 79 + 76 + 20 =
  13. 13.61 + 76 + 58 + 40 =
  14. 14.71 + 79 + 74 + 61 =
  15. 15.86 + 56 + 60 + 74 =
  16. 16.89 + 87 + 79 + 75 =
  17. 17.73 + 54 + 72 + 34 =
  18. 18.89 + 49 + 89 + 74 =
  19. 19.20 + 61 + 42 + 74 =
  20. 20.13 + 78 + 75 + 68 =
  21. 21.75 + 38 + 29 + 11 =
  22. 22.67 + 86 + 87 + 15 =
  23. 23.53 + 73 + 37 + 50 =
  24. 24.15 + 87 + 21 + 49 =
  25. 25.61 + 78 + 28 + 24 =
  26. 26.26 + 46 + 23 + 71 =
  27. 27.89 + 76 + 78 + 31 =
  28. 28.16 + 72 + 64 + 50 =
  29. 29.37 + 20 + 17 + 28 =
  30. 30.76 + 35 + 32 + 80 =
  31. 31.53 + 73 + 21 + 18 =
  32. 32.14 + 33 + 67 + 64 =
  33. 33.86 + 17 + 35 + 12 =
  34. 34.11 + 28 + 66 + 16 =
  35. 35.57 + 43 + 15 + 82 =
  36. 36.56 + 87 + 59 + 29 =
  37. 37.76 + 79 + 35 + 78 =
  38. 38.36 + 15 + 35 + 74 =
  39. 39.15 + 29 + 19 + 31 =
  40. 40.34 + 30 + 72 + 19 =

Answer key

  1. 132
  2. 183
  3. 181
  4. 250
  5. 167
  6. 217
  7. 146
  8. 150
  9. 141
  10. 239
  11. 232
  12. 235
  13. 235
  14. 285
  15. 276
  16. 330
  17. 233
  18. 301
  19. 197
  20. 234
  21. 153
  22. 255
  23. 213
  24. 172
  25. 191
  26. 166
  27. 274
  28. 202
  29. 102
  30. 223
  31. 165
  32. 178
  33. 150
  34. 121
  35. 197
  36. 231
  37. 268
  38. 160
  39. 94
  40. 155

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