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Mental Addition Worksheet

Speed calculation lesson 5: Running totals · Set 901 · 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. 1.71 + 35 + 69 + 54 =
  2. 2.79 + 54 + 12 + 83 =
  3. 3.17 + 72 + 43 + 20 =
  4. 4.56 + 23 + 42 + 33 =
  5. 5.80 + 26 + 13 + 31 =
  6. 6.79 + 84 + 58 + 74 =
  7. 7.65 + 69 + 42 + 21 =
  8. 8.87 + 54 + 42 + 69 =
  9. 9.44 + 85 + 53 + 38 =
  10. 10.36 + 87 + 63 + 81 =
  11. 11.47 + 12 + 30 + 87 =
  12. 12.33 + 58 + 78 + 79 =
  13. 13.86 + 18 + 31 + 27 =
  14. 14.47 + 61 + 75 + 75 =
  15. 15.22 + 23 + 40 + 35 =
  16. 16.49 + 21 + 38 + 73 =
  17. 17.42 + 38 + 86 + 80 =
  18. 18.49 + 35 + 11 + 20 =
  19. 19.80 + 21 + 16 + 31 =
  20. 20.37 + 74 + 33 + 75 =
  21. 21.84 + 38 + 16 + 16 =
  22. 22.55 + 86 + 18 + 36 =
  23. 23.87 + 77 + 86 + 82 =
  24. 24.18 + 25 + 88 + 52 =
  25. 25.58 + 83 + 46 + 59 =
  26. 26.52 + 78 + 54 + 78 =
  27. 27.39 + 33 + 63 + 61 =
  28. 28.51 + 17 + 56 + 14 =
  29. 29.44 + 26 + 19 + 68 =
  30. 30.24 + 27 + 46 + 40 =
  31. 31.44 + 20 + 77 + 43 =
  32. 32.15 + 16 + 72 + 70 =
  33. 33.36 + 66 + 83 + 13 =
  34. 34.72 + 57 + 86 + 19 =
  35. 35.44 + 60 + 28 + 47 =
  36. 36.16 + 45 + 34 + 55 =
  37. 37.24 + 81 + 30 + 56 =
  38. 38.22 + 71 + 73 + 43 =
  39. 39.84 + 19 + 31 + 44 =
  40. 40.22 + 34 + 46 + 89 =

Answer key

  1. 229
  2. 228
  3. 152
  4. 154
  5. 150
  6. 295
  7. 197
  8. 252
  9. 220
  10. 267
  11. 176
  12. 248
  13. 162
  14. 258
  15. 120
  16. 181
  17. 246
  18. 115
  19. 148
  20. 219
  21. 154
  22. 195
  23. 332
  24. 183
  25. 246
  26. 262
  27. 196
  28. 138
  29. 157
  30. 137
  31. 184
  32. 173
  33. 198
  34. 234
  35. 179
  36. 150
  37. 191
  38. 209
  39. 178
  40. 191

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