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Mental Addition Worksheet

Speed calculation lesson 5: Running totals · Set 553 · 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. 1.74 + 38 + 29 + 13 =
  2. 2.44 + 76 + 37 + 24 =
  3. 3.46 + 72 + 13 + 22 =
  4. 4.77 + 18 + 77 + 17 =
  5. 5.22 + 31 + 45 + 48 =
  6. 6.13 + 40 + 69 + 86 =
  7. 7.44 + 15 + 23 + 35 =
  8. 8.72 + 44 + 77 + 55 =
  9. 9.30 + 16 + 49 + 40 =
  10. 10.71 + 47 + 16 + 29 =
  11. 11.14 + 39 + 62 + 50 =
  12. 12.28 + 78 + 33 + 24 =
  13. 13.12 + 58 + 26 + 58 =
  14. 14.39 + 89 + 53 + 13 =
  15. 15.18 + 81 + 82 + 71 =
  16. 16.80 + 26 + 13 + 69 =
  17. 17.42 + 85 + 81 + 70 =
  18. 18.26 + 13 + 71 + 81 =
  19. 19.22 + 64 + 83 + 80 =
  20. 20.23 + 29 + 74 + 52 =
  21. 21.30 + 21 + 45 + 11 =
  22. 22.67 + 31 + 80 + 89 =
  23. 23.69 + 83 + 54 + 84 =
  24. 24.86 + 32 + 79 + 71 =
  25. 25.76 + 54 + 31 + 82 =
  26. 26.42 + 23 + 14 + 55 =
  27. 27.55 + 13 + 35 + 60 =
  28. 28.14 + 78 + 66 + 40 =
  29. 29.26 + 30 + 33 + 14 =
  30. 30.79 + 78 + 59 + 51 =
  31. 31.27 + 84 + 12 + 69 =
  32. 32.71 + 16 + 26 + 28 =
  33. 33.38 + 18 + 59 + 72 =
  34. 34.74 + 23 + 43 + 34 =
  35. 35.81 + 68 + 23 + 85 =
  36. 36.63 + 35 + 21 + 61 =
  37. 37.85 + 88 + 65 + 17 =
  38. 38.46 + 19 + 49 + 17 =
  39. 39.33 + 74 + 32 + 64 =
  40. 40.80 + 84 + 17 + 51 =

Answer key

  1. 154
  2. 181
  3. 153
  4. 189
  5. 146
  6. 208
  7. 117
  8. 248
  9. 135
  10. 163
  11. 165
  12. 163
  13. 154
  14. 194
  15. 252
  16. 188
  17. 278
  18. 191
  19. 249
  20. 178
  21. 107
  22. 267
  23. 290
  24. 268
  25. 243
  26. 134
  27. 163
  28. 198
  29. 103
  30. 267
  31. 192
  32. 141
  33. 187
  34. 174
  35. 257
  36. 180
  37. 255
  38. 131
  39. 203
  40. 232

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