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Mental Addition Worksheet

Speed calculation lesson 5: Running totals · Set 970 · 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. 1.68 + 69 + 48 + 20 =
  2. 2.31 + 76 + 65 + 57 =
  3. 3.42 + 51 + 14 + 61 =
  4. 4.56 + 30 + 88 + 34 =
  5. 5.57 + 48 + 33 + 71 =
  6. 6.17 + 50 + 79 + 11 =
  7. 7.38 + 60 + 48 + 83 =
  8. 8.35 + 81 + 87 + 85 =
  9. 9.75 + 20 + 88 + 74 =
  10. 10.21 + 82 + 48 + 31 =
  11. 11.44 + 43 + 35 + 37 =
  12. 12.57 + 82 + 53 + 44 =
  13. 13.14 + 73 + 86 + 11 =
  14. 14.15 + 63 + 29 + 51 =
  15. 15.45 + 50 + 20 + 38 =
  16. 16.81 + 68 + 69 + 33 =
  17. 17.64 + 22 + 79 + 35 =
  18. 18.27 + 54 + 68 + 22 =
  19. 19.40 + 60 + 73 + 23 =
  20. 20.75 + 13 + 80 + 18 =
  21. 21.71 + 61 + 53 + 87 =
  22. 22.84 + 76 + 40 + 38 =
  23. 23.89 + 89 + 24 + 69 =
  24. 24.42 + 18 + 53 + 58 =
  25. 25.23 + 19 + 26 + 69 =
  26. 26.85 + 61 + 28 + 75 =
  27. 27.64 + 13 + 89 + 37 =
  28. 28.75 + 61 + 16 + 19 =
  29. 29.72 + 31 + 29 + 66 =
  30. 30.64 + 39 + 88 + 86 =
  31. 31.13 + 54 + 34 + 29 =
  32. 32.49 + 76 + 24 + 43 =
  33. 33.61 + 44 + 28 + 59 =
  34. 34.56 + 63 + 60 + 49 =
  35. 35.18 + 36 + 31 + 65 =
  36. 36.32 + 23 + 74 + 18 =
  37. 37.61 + 80 + 31 + 59 =
  38. 38.71 + 32 + 47 + 23 =
  39. 39.29 + 83 + 68 + 60 =
  40. 40.68 + 85 + 16 + 85 =

Answer key

  1. 205
  2. 229
  3. 168
  4. 208
  5. 209
  6. 157
  7. 229
  8. 288
  9. 257
  10. 182
  11. 159
  12. 236
  13. 184
  14. 158
  15. 153
  16. 251
  17. 200
  18. 171
  19. 196
  20. 186
  21. 272
  22. 238
  23. 271
  24. 171
  25. 137
  26. 249
  27. 203
  28. 171
  29. 198
  30. 277
  31. 130
  32. 192
  33. 192
  34. 228
  35. 150
  36. 147
  37. 231
  38. 173
  39. 240
  40. 254

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