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Mental Addition Worksheet

Speed calculation lesson 5: Running totals · Set 883 · 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. 1.63 + 15 + 45 + 77 =
  2. 2.27 + 57 + 81 + 35 =
  3. 3.35 + 29 + 29 + 89 =
  4. 4.89 + 87 + 33 + 57 =
  5. 5.24 + 36 + 57 + 38 =
  6. 6.58 + 33 + 15 + 70 =
  7. 7.14 + 79 + 17 + 75 =
  8. 8.11 + 58 + 84 + 70 =
  9. 9.19 + 19 + 49 + 26 =
  10. 10.56 + 27 + 11 + 33 =
  11. 11.74 + 14 + 66 + 51 =
  12. 12.38 + 78 + 69 + 86 =
  13. 13.47 + 69 + 69 + 51 =
  14. 14.53 + 20 + 75 + 83 =
  15. 15.34 + 53 + 43 + 84 =
  16. 16.79 + 77 + 16 + 64 =
  17. 17.33 + 30 + 16 + 19 =
  18. 18.71 + 35 + 23 + 84 =
  19. 19.40 + 25 + 23 + 71 =
  20. 20.14 + 40 + 68 + 83 =
  21. 21.66 + 80 + 68 + 24 =
  22. 22.83 + 18 + 75 + 26 =
  23. 23.51 + 32 + 16 + 31 =
  24. 24.57 + 17 + 28 + 53 =
  25. 25.66 + 73 + 27 + 89 =
  26. 26.24 + 11 + 69 + 89 =
  27. 27.40 + 54 + 19 + 49 =
  28. 28.83 + 80 + 85 + 54 =
  29. 29.31 + 86 + 67 + 62 =
  30. 30.20 + 22 + 69 + 15 =
  31. 31.14 + 22 + 88 + 79 =
  32. 32.68 + 62 + 45 + 51 =
  33. 33.35 + 74 + 72 + 58 =
  34. 34.35 + 13 + 66 + 23 =
  35. 35.85 + 11 + 48 + 51 =
  36. 36.38 + 43 + 44 + 26 =
  37. 37.65 + 77 + 75 + 27 =
  38. 38.51 + 46 + 13 + 34 =
  39. 39.47 + 25 + 38 + 39 =
  40. 40.68 + 42 + 78 + 45 =

Answer key

  1. 200
  2. 200
  3. 182
  4. 266
  5. 155
  6. 176
  7. 185
  8. 223
  9. 113
  10. 127
  11. 205
  12. 271
  13. 236
  14. 231
  15. 214
  16. 236
  17. 98
  18. 213
  19. 159
  20. 205
  21. 238
  22. 202
  23. 130
  24. 155
  25. 255
  26. 193
  27. 162
  28. 302
  29. 246
  30. 126
  31. 203
  32. 226
  33. 239
  34. 137
  35. 195
  36. 151
  37. 244
  38. 144
  39. 149
  40. 233

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