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Mental Addition Worksheet

Speed calculation lesson 5: Running totals · Set 888 · 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. 1.17 + 53 + 60 + 21 =
  2. 2.75 + 84 + 87 + 29 =
  3. 3.75 + 46 + 69 + 73 =
  4. 4.58 + 77 + 14 + 27 =
  5. 5.26 + 31 + 37 + 25 =
  6. 6.35 + 81 + 44 + 14 =
  7. 7.53 + 79 + 36 + 25 =
  8. 8.16 + 38 + 67 + 26 =
  9. 9.57 + 56 + 13 + 28 =
  10. 10.85 + 28 + 13 + 65 =
  11. 11.22 + 72 + 79 + 13 =
  12. 12.51 + 17 + 43 + 13 =
  13. 13.85 + 31 + 87 + 66 =
  14. 14.17 + 71 + 68 + 76 =
  15. 15.54 + 60 + 12 + 11 =
  16. 16.77 + 23 + 62 + 66 =
  17. 17.70 + 54 + 59 + 33 =
  18. 18.76 + 65 + 19 + 84 =
  19. 19.16 + 21 + 31 + 27 =
  20. 20.57 + 17 + 79 + 85 =
  21. 21.53 + 51 + 33 + 69 =
  22. 22.65 + 78 + 72 + 33 =
  23. 23.34 + 53 + 77 + 11 =
  24. 24.72 + 76 + 84 + 37 =
  25. 25.11 + 85 + 50 + 20 =
  26. 26.21 + 48 + 31 + 20 =
  27. 27.41 + 15 + 11 + 83 =
  28. 28.14 + 80 + 13 + 66 =
  29. 29.75 + 13 + 21 + 75 =
  30. 30.34 + 55 + 35 + 14 =
  31. 31.85 + 80 + 62 + 42 =
  32. 32.78 + 63 + 75 + 49 =
  33. 33.89 + 18 + 53 + 48 =
  34. 34.78 + 21 + 11 + 12 =
  35. 35.54 + 63 + 63 + 79 =
  36. 36.19 + 50 + 20 + 47 =
  37. 37.61 + 52 + 28 + 80 =
  38. 38.41 + 75 + 19 + 11 =
  39. 39.20 + 15 + 79 + 70 =
  40. 40.67 + 42 + 86 + 33 =

Answer key

  1. 151
  2. 275
  3. 263
  4. 176
  5. 119
  6. 174
  7. 193
  8. 147
  9. 154
  10. 191
  11. 186
  12. 124
  13. 269
  14. 232
  15. 137
  16. 228
  17. 216
  18. 244
  19. 95
  20. 238
  21. 206
  22. 248
  23. 175
  24. 269
  25. 166
  26. 120
  27. 150
  28. 173
  29. 184
  30. 138
  31. 269
  32. 265
  33. 208
  34. 122
  35. 259
  36. 136
  37. 221
  38. 146
  39. 184
  40. 228

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