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Mental Addition Worksheet

Speed calculation lesson 5: Running totals · Set 967 · 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. 1.14 + 44 + 72 + 58 =
  2. 2.85 + 66 + 83 + 15 =
  3. 3.59 + 40 + 85 + 12 =
  4. 4.70 + 82 + 65 + 26 =
  5. 5.83 + 57 + 49 + 15 =
  6. 6.79 + 74 + 59 + 12 =
  7. 7.74 + 58 + 47 + 21 =
  8. 8.34 + 44 + 51 + 81 =
  9. 9.14 + 57 + 87 + 29 =
  10. 10.37 + 41 + 58 + 49 =
  11. 11.25 + 33 + 16 + 48 =
  12. 12.18 + 52 + 75 + 41 =
  13. 13.74 + 31 + 79 + 69 =
  14. 14.79 + 25 + 37 + 70 =
  15. 15.43 + 74 + 37 + 47 =
  16. 16.42 + 78 + 73 + 35 =
  17. 17.86 + 58 + 55 + 63 =
  18. 18.12 + 19 + 68 + 22 =
  19. 19.29 + 35 + 12 + 41 =
  20. 20.21 + 29 + 44 + 24 =
  21. 21.65 + 59 + 73 + 73 =
  22. 22.11 + 36 + 52 + 71 =
  23. 23.52 + 37 + 35 + 31 =
  24. 24.29 + 40 + 25 + 45 =
  25. 25.57 + 51 + 72 + 20 =
  26. 26.87 + 51 + 41 + 12 =
  27. 27.11 + 48 + 63 + 31 =
  28. 28.18 + 82 + 44 + 85 =
  29. 29.17 + 51 + 45 + 83 =
  30. 30.55 + 25 + 76 + 13 =
  31. 31.12 + 27 + 64 + 33 =
  32. 32.84 + 52 + 70 + 24 =
  33. 33.52 + 27 + 12 + 45 =
  34. 34.66 + 81 + 19 + 53 =
  35. 35.19 + 47 + 76 + 18 =
  36. 36.12 + 33 + 53 + 34 =
  37. 37.81 + 15 + 46 + 41 =
  38. 38.47 + 40 + 62 + 34 =
  39. 39.88 + 21 + 43 + 55 =
  40. 40.80 + 81 + 83 + 38 =

Answer key

  1. 188
  2. 249
  3. 196
  4. 243
  5. 204
  6. 224
  7. 200
  8. 210
  9. 187
  10. 185
  11. 122
  12. 186
  13. 253
  14. 211
  15. 201
  16. 228
  17. 262
  18. 121
  19. 117
  20. 118
  21. 270
  22. 170
  23. 155
  24. 139
  25. 200
  26. 191
  27. 153
  28. 229
  29. 196
  30. 169
  31. 136
  32. 230
  33. 136
  34. 219
  35. 160
  36. 132
  37. 183
  38. 183
  39. 207
  40. 282

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