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Mental Addition Worksheet

Speed calculation lesson 5: Running totals · Set 580 · 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. 1.49 + 38 + 44 + 20 =
  2. 2.40 + 32 + 51 + 16 =
  3. 3.41 + 15 + 78 + 44 =
  4. 4.15 + 11 + 11 + 60 =
  5. 5.16 + 18 + 70 + 42 =
  6. 6.42 + 49 + 85 + 39 =
  7. 7.22 + 79 + 58 + 80 =
  8. 8.26 + 51 + 32 + 13 =
  9. 9.45 + 54 + 66 + 86 =
  10. 10.41 + 51 + 74 + 89 =
  11. 11.11 + 32 + 27 + 79 =
  12. 12.63 + 82 + 42 + 76 =
  13. 13.55 + 68 + 66 + 62 =
  14. 14.26 + 79 + 33 + 34 =
  15. 15.81 + 60 + 34 + 71 =
  16. 16.11 + 34 + 21 + 57 =
  17. 17.53 + 22 + 57 + 57 =
  18. 18.19 + 29 + 11 + 28 =
  19. 19.22 + 76 + 45 + 64 =
  20. 20.22 + 63 + 84 + 24 =
  21. 21.11 + 63 + 54 + 66 =
  22. 22.25 + 24 + 24 + 87 =
  23. 23.89 + 30 + 63 + 32 =
  24. 24.65 + 74 + 29 + 54 =
  25. 25.28 + 71 + 53 + 22 =
  26. 26.45 + 17 + 70 + 15 =
  27. 27.21 + 32 + 19 + 26 =
  28. 28.26 + 55 + 14 + 19 =
  29. 29.19 + 36 + 77 + 12 =
  30. 30.25 + 38 + 41 + 65 =
  31. 31.68 + 32 + 85 + 31 =
  32. 32.34 + 14 + 20 + 17 =
  33. 33.27 + 24 + 70 + 32 =
  34. 34.17 + 43 + 65 + 37 =
  35. 35.13 + 55 + 25 + 79 =
  36. 36.17 + 59 + 38 + 64 =
  37. 37.63 + 11 + 82 + 20 =
  38. 38.14 + 79 + 64 + 75 =
  39. 39.41 + 22 + 77 + 40 =
  40. 40.31 + 85 + 25 + 19 =

Answer key

  1. 151
  2. 139
  3. 178
  4. 97
  5. 146
  6. 215
  7. 239
  8. 122
  9. 251
  10. 255
  11. 149
  12. 263
  13. 251
  14. 172
  15. 246
  16. 123
  17. 189
  18. 87
  19. 207
  20. 193
  21. 194
  22. 160
  23. 214
  24. 222
  25. 174
  26. 147
  27. 98
  28. 114
  29. 144
  30. 169
  31. 216
  32. 85
  33. 153
  34. 162
  35. 172
  36. 178
  37. 176
  38. 232
  39. 180
  40. 160

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