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Mental Addition Worksheet

Speed calculation lesson 5: Running totals · Set 560 · 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. 1.31 + 26 + 42 + 39 =
  2. 2.79 + 45 + 49 + 30 =
  3. 3.55 + 34 + 20 + 62 =
  4. 4.26 + 68 + 51 + 41 =
  5. 5.26 + 73 + 71 + 51 =
  6. 6.81 + 83 + 36 + 57 =
  7. 7.37 + 25 + 30 + 38 =
  8. 8.70 + 16 + 80 + 71 =
  9. 9.33 + 13 + 37 + 38 =
  10. 10.77 + 70 + 67 + 32 =
  11. 11.71 + 83 + 89 + 71 =
  12. 12.85 + 88 + 27 + 41 =
  13. 13.12 + 38 + 89 + 82 =
  14. 14.37 + 21 + 31 + 29 =
  15. 15.75 + 62 + 19 + 56 =
  16. 16.33 + 63 + 15 + 38 =
  17. 17.87 + 87 + 83 + 73 =
  18. 18.75 + 60 + 12 + 16 =
  19. 19.13 + 61 + 73 + 88 =
  20. 20.42 + 44 + 17 + 38 =
  21. 21.87 + 21 + 78 + 11 =
  22. 22.34 + 29 + 60 + 83 =
  23. 23.79 + 53 + 21 + 49 =
  24. 24.15 + 15 + 25 + 30 =
  25. 25.89 + 79 + 70 + 11 =
  26. 26.32 + 77 + 53 + 64 =
  27. 27.64 + 71 + 19 + 48 =
  28. 28.46 + 34 + 56 + 44 =
  29. 29.74 + 31 + 34 + 70 =
  30. 30.11 + 67 + 33 + 50 =
  31. 31.72 + 36 + 67 + 85 =
  32. 32.22 + 23 + 68 + 80 =
  33. 33.88 + 31 + 34 + 38 =
  34. 34.46 + 26 + 67 + 39 =
  35. 35.34 + 68 + 35 + 23 =
  36. 36.64 + 83 + 31 + 18 =
  37. 37.54 + 23 + 51 + 27 =
  38. 38.87 + 72 + 82 + 19 =
  39. 39.53 + 88 + 75 + 23 =
  40. 40.75 + 53 + 42 + 73 =

Answer key

  1. 138
  2. 203
  3. 171
  4. 186
  5. 221
  6. 257
  7. 130
  8. 237
  9. 121
  10. 246
  11. 314
  12. 241
  13. 221
  14. 118
  15. 212
  16. 149
  17. 330
  18. 163
  19. 235
  20. 141
  21. 197
  22. 206
  23. 202
  24. 85
  25. 249
  26. 226
  27. 202
  28. 180
  29. 209
  30. 161
  31. 260
  32. 193
  33. 191
  34. 178
  35. 160
  36. 196
  37. 155
  38. 260
  39. 239
  40. 243

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