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Mental Addition Worksheet

Speed calculation lesson 5: Running totals · Set 905 · 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. 1.23 + 32 + 78 + 43 =
  2. 2.64 + 30 + 30 + 64 =
  3. 3.22 + 31 + 84 + 18 =
  4. 4.47 + 37 + 30 + 25 =
  5. 5.55 + 73 + 77 + 36 =
  6. 6.65 + 15 + 55 + 15 =
  7. 7.52 + 68 + 28 + 17 =
  8. 8.37 + 20 + 23 + 33 =
  9. 9.20 + 48 + 73 + 37 =
  10. 10.34 + 88 + 23 + 21 =
  11. 11.76 + 51 + 56 + 52 =
  12. 12.43 + 18 + 51 + 37 =
  13. 13.18 + 68 + 73 + 46 =
  14. 14.21 + 22 + 19 + 24 =
  15. 15.45 + 77 + 12 + 56 =
  16. 16.43 + 32 + 27 + 56 =
  17. 17.80 + 21 + 66 + 76 =
  18. 18.72 + 37 + 39 + 47 =
  19. 19.83 + 48 + 86 + 35 =
  20. 20.12 + 75 + 51 + 20 =
  21. 21.68 + 52 + 17 + 14 =
  22. 22.28 + 49 + 48 + 15 =
  23. 23.83 + 87 + 52 + 56 =
  24. 24.21 + 28 + 46 + 79 =
  25. 25.52 + 22 + 79 + 26 =
  26. 26.58 + 48 + 46 + 25 =
  27. 27.25 + 59 + 69 + 59 =
  28. 28.49 + 78 + 30 + 17 =
  29. 29.68 + 80 + 31 + 76 =
  30. 30.14 + 19 + 35 + 17 =
  31. 31.36 + 16 + 21 + 43 =
  32. 32.27 + 55 + 37 + 45 =
  33. 33.11 + 71 + 49 + 65 =
  34. 34.20 + 27 + 35 + 63 =
  35. 35.68 + 50 + 19 + 35 =
  36. 36.37 + 60 + 31 + 81 =
  37. 37.60 + 85 + 86 + 39 =
  38. 38.65 + 34 + 65 + 22 =
  39. 39.16 + 15 + 64 + 14 =
  40. 40.50 + 34 + 44 + 53 =

Answer key

  1. 176
  2. 188
  3. 155
  4. 139
  5. 241
  6. 150
  7. 165
  8. 113
  9. 178
  10. 166
  11. 235
  12. 149
  13. 205
  14. 86
  15. 190
  16. 158
  17. 243
  18. 195
  19. 252
  20. 158
  21. 151
  22. 140
  23. 278
  24. 174
  25. 179
  26. 177
  27. 212
  28. 174
  29. 255
  30. 85
  31. 116
  32. 164
  33. 196
  34. 145
  35. 172
  36. 209
  37. 270
  38. 186
  39. 109
  40. 181

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