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Mental Addition Worksheet

Speed calculation lesson 5: Running totals · Set 837 · 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. 1.82 + 34 + 19 + 38 =
  2. 2.45 + 21 + 74 + 75 =
  3. 3.89 + 55 + 68 + 71 =
  4. 4.47 + 25 + 65 + 81 =
  5. 5.78 + 39 + 15 + 34 =
  6. 6.20 + 86 + 27 + 34 =
  7. 7.83 + 19 + 46 + 67 =
  8. 8.12 + 42 + 36 + 26 =
  9. 9.65 + 61 + 46 + 87 =
  10. 10.56 + 18 + 19 + 23 =
  11. 11.45 + 89 + 55 + 64 =
  12. 12.76 + 39 + 18 + 51 =
  13. 13.81 + 20 + 41 + 81 =
  14. 14.14 + 47 + 27 + 82 =
  15. 15.75 + 43 + 86 + 74 =
  16. 16.74 + 24 + 29 + 35 =
  17. 17.55 + 86 + 77 + 39 =
  18. 18.59 + 74 + 70 + 19 =
  19. 19.27 + 44 + 24 + 39 =
  20. 20.51 + 79 + 57 + 84 =
  21. 21.24 + 58 + 29 + 71 =
  22. 22.72 + 55 + 77 + 84 =
  23. 23.79 + 41 + 35 + 82 =
  24. 24.47 + 88 + 50 + 31 =
  25. 25.28 + 88 + 48 + 25 =
  26. 26.59 + 31 + 12 + 36 =
  27. 27.63 + 85 + 30 + 72 =
  28. 28.83 + 43 + 80 + 23 =
  29. 29.14 + 19 + 29 + 87 =
  30. 30.84 + 11 + 86 + 71 =
  31. 31.71 + 56 + 34 + 75 =
  32. 32.24 + 58 + 55 + 24 =
  33. 33.13 + 11 + 78 + 11 =
  34. 34.49 + 19 + 28 + 80 =
  35. 35.50 + 23 + 19 + 28 =
  36. 36.70 + 54 + 85 + 58 =
  37. 37.14 + 13 + 78 + 87 =
  38. 38.84 + 16 + 73 + 83 =
  39. 39.48 + 74 + 52 + 50 =
  40. 40.58 + 29 + 74 + 72 =

Answer key

  1. 173
  2. 215
  3. 283
  4. 218
  5. 166
  6. 167
  7. 215
  8. 116
  9. 259
  10. 116
  11. 253
  12. 184
  13. 223
  14. 170
  15. 278
  16. 162
  17. 257
  18. 222
  19. 134
  20. 271
  21. 182
  22. 288
  23. 237
  24. 216
  25. 189
  26. 138
  27. 250
  28. 229
  29. 149
  30. 252
  31. 236
  32. 161
  33. 113
  34. 176
  35. 120
  36. 267
  37. 192
  38. 256
  39. 224
  40. 233

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