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Mental Addition Worksheet

Speed calculation lesson 5: Running totals · Set 746 · 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. 1.62 + 64 + 22 + 30 =
  2. 2.24 + 54 + 87 + 30 =
  3. 3.26 + 49 + 19 + 11 =
  4. 4.46 + 36 + 11 + 43 =
  5. 5.23 + 71 + 37 + 14 =
  6. 6.73 + 86 + 57 + 47 =
  7. 7.70 + 22 + 40 + 55 =
  8. 8.70 + 43 + 14 + 46 =
  9. 9.53 + 28 + 18 + 54 =
  10. 10.62 + 12 + 75 + 37 =
  11. 11.24 + 75 + 77 + 35 =
  12. 12.61 + 26 + 86 + 50 =
  13. 13.58 + 39 + 24 + 54 =
  14. 14.56 + 45 + 31 + 88 =
  15. 15.19 + 31 + 22 + 34 =
  16. 16.21 + 56 + 63 + 68 =
  17. 17.39 + 76 + 53 + 60 =
  18. 18.81 + 53 + 34 + 83 =
  19. 19.17 + 31 + 21 + 43 =
  20. 20.62 + 37 + 77 + 50 =
  21. 21.78 + 76 + 77 + 15 =
  22. 22.60 + 15 + 75 + 15 =
  23. 23.84 + 68 + 44 + 29 =
  24. 24.16 + 23 + 25 + 44 =
  25. 25.64 + 72 + 30 + 47 =
  26. 26.30 + 57 + 60 + 16 =
  27. 27.44 + 81 + 75 + 68 =
  28. 28.85 + 37 + 69 + 18 =
  29. 29.53 + 17 + 21 + 85 =
  30. 30.63 + 55 + 54 + 72 =
  31. 31.55 + 26 + 48 + 74 =
  32. 32.54 + 80 + 22 + 63 =
  33. 33.55 + 71 + 11 + 48 =
  34. 34.25 + 79 + 39 + 50 =
  35. 35.27 + 68 + 19 + 59 =
  36. 36.51 + 60 + 49 + 11 =
  37. 37.44 + 38 + 22 + 12 =
  38. 38.89 + 15 + 77 + 39 =
  39. 39.37 + 86 + 88 + 23 =
  40. 40.12 + 74 + 19 + 66 =

Answer key

  1. 178
  2. 195
  3. 105
  4. 136
  5. 145
  6. 263
  7. 187
  8. 173
  9. 153
  10. 186
  11. 211
  12. 223
  13. 175
  14. 220
  15. 106
  16. 208
  17. 228
  18. 251
  19. 112
  20. 226
  21. 246
  22. 165
  23. 225
  24. 108
  25. 213
  26. 163
  27. 268
  28. 209
  29. 176
  30. 244
  31. 203
  32. 219
  33. 185
  34. 193
  35. 173
  36. 171
  37. 116
  38. 220
  39. 234
  40. 171

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