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Mental Addition Worksheet

Speed calculation lesson 5: Running totals · Set 716 · 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. 1.33 + 27 + 25 + 22 =
  2. 2.58 + 42 + 24 + 12 =
  3. 3.62 + 62 + 21 + 47 =
  4. 4.14 + 87 + 22 + 47 =
  5. 5.19 + 69 + 89 + 62 =
  6. 6.13 + 33 + 15 + 38 =
  7. 7.74 + 76 + 75 + 48 =
  8. 8.78 + 65 + 47 + 70 =
  9. 9.25 + 19 + 21 + 57 =
  10. 10.66 + 65 + 13 + 74 =
  11. 11.25 + 30 + 26 + 28 =
  12. 12.30 + 44 + 46 + 48 =
  13. 13.25 + 37 + 41 + 85 =
  14. 14.49 + 78 + 50 + 71 =
  15. 15.68 + 42 + 38 + 48 =
  16. 16.87 + 14 + 13 + 55 =
  17. 17.72 + 48 + 19 + 11 =
  18. 18.42 + 61 + 72 + 57 =
  19. 19.34 + 87 + 39 + 79 =
  20. 20.42 + 88 + 19 + 54 =
  21. 21.17 + 66 + 88 + 20 =
  22. 22.75 + 23 + 32 + 55 =
  23. 23.25 + 12 + 43 + 27 =
  24. 24.32 + 42 + 24 + 48 =
  25. 25.35 + 30 + 28 + 68 =
  26. 26.16 + 86 + 46 + 33 =
  27. 27.13 + 75 + 60 + 46 =
  28. 28.43 + 75 + 45 + 22 =
  29. 29.68 + 27 + 50 + 62 =
  30. 30.18 + 18 + 43 + 41 =
  31. 31.51 + 18 + 69 + 53 =
  32. 32.71 + 19 + 29 + 66 =
  33. 33.65 + 52 + 62 + 88 =
  34. 34.78 + 62 + 11 + 66 =
  35. 35.37 + 57 + 44 + 59 =
  36. 36.89 + 76 + 59 + 65 =
  37. 37.62 + 15 + 73 + 85 =
  38. 38.21 + 88 + 63 + 54 =
  39. 39.31 + 71 + 69 + 54 =
  40. 40.53 + 25 + 25 + 46 =

Answer key

  1. 107
  2. 136
  3. 192
  4. 170
  5. 239
  6. 99
  7. 273
  8. 260
  9. 122
  10. 218
  11. 109
  12. 168
  13. 188
  14. 248
  15. 196
  16. 169
  17. 150
  18. 232
  19. 239
  20. 203
  21. 191
  22. 185
  23. 107
  24. 146
  25. 161
  26. 181
  27. 194
  28. 185
  29. 207
  30. 120
  31. 191
  32. 185
  33. 267
  34. 217
  35. 197
  36. 289
  37. 235
  38. 226
  39. 225
  40. 149

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