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Mental Addition Worksheet

Speed calculation lesson 5: Running totals · Set 948 · 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. 1.74 + 35 + 61 + 27 =
  2. 2.56 + 46 + 61 + 65 =
  3. 3.14 + 29 + 20 + 86 =
  4. 4.49 + 27 + 13 + 27 =
  5. 5.16 + 26 + 44 + 18 =
  6. 6.80 + 17 + 25 + 47 =
  7. 7.23 + 44 + 48 + 44 =
  8. 8.12 + 65 + 37 + 40 =
  9. 9.72 + 23 + 39 + 27 =
  10. 10.75 + 73 + 28 + 65 =
  11. 11.19 + 30 + 41 + 60 =
  12. 12.25 + 33 + 49 + 89 =
  13. 13.74 + 53 + 20 + 12 =
  14. 14.38 + 78 + 45 + 89 =
  15. 15.32 + 14 + 41 + 39 =
  16. 16.16 + 55 + 36 + 84 =
  17. 17.42 + 16 + 48 + 38 =
  18. 18.72 + 54 + 89 + 37 =
  19. 19.34 + 57 + 89 + 88 =
  20. 20.77 + 23 + 69 + 23 =
  21. 21.63 + 21 + 25 + 27 =
  22. 22.47 + 85 + 65 + 69 =
  23. 23.38 + 35 + 42 + 87 =
  24. 24.44 + 85 + 75 + 16 =
  25. 25.34 + 80 + 33 + 54 =
  26. 26.55 + 31 + 16 + 48 =
  27. 27.38 + 41 + 41 + 34 =
  28. 28.19 + 54 + 13 + 33 =
  29. 29.11 + 23 + 89 + 42 =
  30. 30.30 + 24 + 18 + 12 =
  31. 31.56 + 15 + 35 + 29 =
  32. 32.45 + 61 + 35 + 24 =
  33. 33.57 + 51 + 15 + 68 =
  34. 34.21 + 57 + 40 + 39 =
  35. 35.48 + 26 + 31 + 48 =
  36. 36.70 + 33 + 64 + 66 =
  37. 37.43 + 19 + 20 + 59 =
  38. 38.52 + 80 + 34 + 74 =
  39. 39.54 + 81 + 68 + 68 =
  40. 40.76 + 82 + 21 + 34 =

Answer key

  1. 197
  2. 228
  3. 149
  4. 116
  5. 104
  6. 169
  7. 159
  8. 154
  9. 161
  10. 241
  11. 150
  12. 196
  13. 159
  14. 250
  15. 126
  16. 191
  17. 144
  18. 252
  19. 268
  20. 192
  21. 136
  22. 266
  23. 202
  24. 220
  25. 201
  26. 150
  27. 154
  28. 119
  29. 165
  30. 84
  31. 135
  32. 165
  33. 191
  34. 157
  35. 153
  36. 233
  37. 141
  38. 240
  39. 271
  40. 213

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