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Mental Addition Worksheet

Speed calculation lesson 5: Running totals · Set 971 · 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. 1.56 + 24 + 56 + 37 =
  2. 2.12 + 50 + 25 + 55 =
  3. 3.30 + 55 + 52 + 59 =
  4. 4.41 + 66 + 65 + 49 =
  5. 5.14 + 18 + 47 + 45 =
  6. 6.81 + 69 + 21 + 72 =
  7. 7.21 + 70 + 46 + 39 =
  8. 8.41 + 23 + 50 + 20 =
  9. 9.42 + 46 + 34 + 29 =
  10. 10.80 + 20 + 53 + 23 =
  11. 11.12 + 79 + 36 + 30 =
  12. 12.59 + 38 + 53 + 38 =
  13. 13.20 + 29 + 54 + 51 =
  14. 14.41 + 76 + 39 + 48 =
  15. 15.49 + 12 + 28 + 84 =
  16. 16.29 + 74 + 18 + 21 =
  17. 17.50 + 26 + 38 + 79 =
  18. 18.13 + 85 + 50 + 28 =
  19. 19.16 + 51 + 80 + 38 =
  20. 20.32 + 51 + 40 + 11 =
  21. 21.49 + 59 + 27 + 59 =
  22. 22.42 + 24 + 35 + 26 =
  23. 23.21 + 84 + 27 + 52 =
  24. 24.62 + 76 + 81 + 58 =
  25. 25.62 + 85 + 17 + 46 =
  26. 26.45 + 20 + 34 + 30 =
  27. 27.88 + 73 + 72 + 19 =
  28. 28.73 + 77 + 72 + 83 =
  29. 29.47 + 49 + 38 + 76 =
  30. 30.73 + 30 + 34 + 68 =
  31. 31.80 + 54 + 66 + 76 =
  32. 32.75 + 84 + 86 + 45 =
  33. 33.40 + 18 + 18 + 41 =
  34. 34.85 + 38 + 29 + 39 =
  35. 35.62 + 44 + 46 + 37 =
  36. 36.85 + 61 + 83 + 37 =
  37. 37.24 + 53 + 69 + 14 =
  38. 38.14 + 77 + 76 + 60 =
  39. 39.53 + 20 + 67 + 29 =
  40. 40.38 + 12 + 67 + 28 =

Answer key

  1. 173
  2. 142
  3. 196
  4. 221
  5. 124
  6. 243
  7. 176
  8. 134
  9. 151
  10. 176
  11. 157
  12. 188
  13. 154
  14. 204
  15. 173
  16. 142
  17. 193
  18. 176
  19. 185
  20. 134
  21. 194
  22. 127
  23. 184
  24. 277
  25. 210
  26. 129
  27. 252
  28. 305
  29. 210
  30. 205
  31. 276
  32. 290
  33. 117
  34. 191
  35. 189
  36. 266
  37. 160
  38. 227
  39. 169
  40. 145

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