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Mental Addition Worksheet

Speed calculation lesson 5: Running totals · Set 347 · 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. 1.23 + 46 + 28 + 89 =
  2. 2.59 + 44 + 66 + 77 =
  3. 3.54 + 22 + 12 + 44 =
  4. 4.30 + 58 + 22 + 33 =
  5. 5.39 + 65 + 46 + 12 =
  6. 6.19 + 76 + 23 + 44 =
  7. 7.89 + 22 + 57 + 71 =
  8. 8.63 + 17 + 64 + 77 =
  9. 9.34 + 31 + 26 + 47 =
  10. 10.26 + 31 + 47 + 57 =
  11. 11.23 + 59 + 50 + 81 =
  12. 12.11 + 16 + 23 + 54 =
  13. 13.73 + 25 + 32 + 33 =
  14. 14.24 + 39 + 46 + 15 =
  15. 15.23 + 41 + 66 + 66 =
  16. 16.81 + 75 + 47 + 47 =
  17. 17.25 + 28 + 18 + 88 =
  18. 18.68 + 57 + 48 + 24 =
  19. 19.38 + 29 + 68 + 41 =
  20. 20.80 + 74 + 22 + 33 =
  21. 21.65 + 60 + 27 + 86 =
  22. 22.17 + 43 + 74 + 30 =
  23. 23.83 + 17 + 73 + 43 =
  24. 24.71 + 33 + 24 + 78 =
  25. 25.55 + 33 + 23 + 22 =
  26. 26.88 + 86 + 11 + 32 =
  27. 27.15 + 73 + 24 + 33 =
  28. 28.72 + 14 + 80 + 30 =
  29. 29.85 + 27 + 89 + 25 =
  30. 30.52 + 12 + 33 + 28 =
  31. 31.20 + 89 + 60 + 42 =
  32. 32.54 + 18 + 51 + 73 =
  33. 33.33 + 53 + 58 + 12 =
  34. 34.32 + 52 + 62 + 56 =
  35. 35.87 + 79 + 71 + 14 =
  36. 36.79 + 78 + 60 + 69 =
  37. 37.18 + 15 + 87 + 12 =
  38. 38.41 + 64 + 17 + 59 =
  39. 39.55 + 89 + 30 + 47 =
  40. 40.69 + 70 + 26 + 69 =

Answer key

  1. 186
  2. 246
  3. 132
  4. 143
  5. 162
  6. 162
  7. 239
  8. 221
  9. 138
  10. 161
  11. 213
  12. 104
  13. 163
  14. 124
  15. 196
  16. 250
  17. 159
  18. 197
  19. 176
  20. 209
  21. 238
  22. 164
  23. 216
  24. 206
  25. 133
  26. 217
  27. 145
  28. 196
  29. 226
  30. 125
  31. 211
  32. 196
  33. 156
  34. 202
  35. 251
  36. 286
  37. 132
  38. 181
  39. 221
  40. 234

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