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Mental Addition Worksheet

Speed calculation lesson 5: Running totals · Set 989 · 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. 1.27 + 70 + 45 + 30 =
  2. 2.59 + 80 + 49 + 18 =
  3. 3.40 + 69 + 74 + 11 =
  4. 4.66 + 62 + 13 + 21 =
  5. 5.74 + 42 + 28 + 39 =
  6. 6.14 + 11 + 60 + 69 =
  7. 7.24 + 53 + 78 + 64 =
  8. 8.71 + 53 + 20 + 40 =
  9. 9.18 + 22 + 76 + 26 =
  10. 10.16 + 20 + 48 + 41 =
  11. 11.37 + 77 + 26 + 60 =
  12. 12.47 + 49 + 88 + 29 =
  13. 13.46 + 50 + 29 + 50 =
  14. 14.39 + 12 + 45 + 51 =
  15. 15.46 + 12 + 58 + 34 =
  16. 16.46 + 56 + 21 + 82 =
  17. 17.68 + 69 + 28 + 77 =
  18. 18.57 + 51 + 36 + 46 =
  19. 19.42 + 86 + 85 + 27 =
  20. 20.29 + 87 + 15 + 43 =
  21. 21.38 + 13 + 59 + 47 =
  22. 22.47 + 46 + 43 + 37 =
  23. 23.59 + 55 + 52 + 12 =
  24. 24.82 + 88 + 72 + 80 =
  25. 25.56 + 74 + 42 + 73 =
  26. 26.15 + 20 + 51 + 30 =
  27. 27.82 + 85 + 61 + 62 =
  28. 28.88 + 17 + 27 + 54 =
  29. 29.72 + 62 + 12 + 24 =
  30. 30.15 + 35 + 13 + 28 =
  31. 31.55 + 29 + 33 + 55 =
  32. 32.63 + 63 + 39 + 81 =
  33. 33.54 + 30 + 45 + 80 =
  34. 34.79 + 40 + 13 + 49 =
  35. 35.13 + 16 + 41 + 18 =
  36. 36.19 + 78 + 54 + 45 =
  37. 37.53 + 16 + 60 + 32 =
  38. 38.22 + 16 + 83 + 46 =
  39. 39.68 + 50 + 14 + 80 =
  40. 40.60 + 79 + 44 + 45 =

Answer key

  1. 172
  2. 206
  3. 194
  4. 162
  5. 183
  6. 154
  7. 219
  8. 184
  9. 142
  10. 125
  11. 200
  12. 213
  13. 175
  14. 147
  15. 150
  16. 205
  17. 242
  18. 190
  19. 240
  20. 174
  21. 157
  22. 173
  23. 178
  24. 322
  25. 245
  26. 116
  27. 290
  28. 186
  29. 170
  30. 91
  31. 172
  32. 246
  33. 209
  34. 181
  35. 88
  36. 196
  37. 161
  38. 167
  39. 212
  40. 228

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