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Mental Addition Worksheet

Speed calculation lesson 5: Running totals · Set 846 · 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. 1.13 + 43 + 43 + 55 =
  2. 2.75 + 26 + 13 + 46 =
  3. 3.77 + 89 + 85 + 33 =
  4. 4.25 + 24 + 41 + 82 =
  5. 5.78 + 63 + 70 + 45 =
  6. 6.85 + 83 + 25 + 51 =
  7. 7.71 + 22 + 13 + 14 =
  8. 8.65 + 35 + 25 + 26 =
  9. 9.61 + 34 + 54 + 57 =
  10. 10.31 + 65 + 60 + 47 =
  11. 11.35 + 74 + 56 + 29 =
  12. 12.20 + 23 + 43 + 68 =
  13. 13.45 + 64 + 66 + 62 =
  14. 14.52 + 16 + 49 + 12 =
  15. 15.50 + 42 + 54 + 63 =
  16. 16.17 + 52 + 41 + 24 =
  17. 17.21 + 29 + 30 + 47 =
  18. 18.68 + 89 + 85 + 84 =
  19. 19.19 + 32 + 43 + 43 =
  20. 20.76 + 78 + 35 + 25 =
  21. 21.45 + 20 + 85 + 61 =
  22. 22.82 + 21 + 56 + 26 =
  23. 23.37 + 52 + 14 + 32 =
  24. 24.62 + 27 + 84 + 77 =
  25. 25.41 + 65 + 21 + 66 =
  26. 26.24 + 78 + 11 + 11 =
  27. 27.66 + 64 + 21 + 63 =
  28. 28.77 + 58 + 59 + 11 =
  29. 29.56 + 14 + 51 + 12 =
  30. 30.82 + 48 + 80 + 47 =
  31. 31.45 + 86 + 72 + 47 =
  32. 32.17 + 60 + 63 + 61 =
  33. 33.74 + 83 + 43 + 58 =
  34. 34.12 + 49 + 76 + 47 =
  35. 35.74 + 23 + 28 + 24 =
  36. 36.81 + 64 + 69 + 66 =
  37. 37.79 + 62 + 86 + 63 =
  38. 38.54 + 55 + 73 + 64 =
  39. 39.57 + 39 + 36 + 50 =
  40. 40.28 + 63 + 64 + 40 =

Answer key

  1. 154
  2. 160
  3. 284
  4. 172
  5. 256
  6. 244
  7. 120
  8. 151
  9. 206
  10. 203
  11. 194
  12. 154
  13. 237
  14. 129
  15. 209
  16. 134
  17. 127
  18. 326
  19. 137
  20. 214
  21. 211
  22. 185
  23. 135
  24. 250
  25. 193
  26. 124
  27. 214
  28. 205
  29. 133
  30. 257
  31. 250
  32. 201
  33. 258
  34. 184
  35. 149
  36. 280
  37. 290
  38. 246
  39. 182
  40. 195

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