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Mental Addition Worksheet

Speed calculation lesson 5: Running totals · Set 987 · 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. 1.75 + 71 + 50 + 14 =
  2. 2.38 + 65 + 46 + 34 =
  3. 3.20 + 37 + 36 + 54 =
  4. 4.56 + 53 + 60 + 68 =
  5. 5.73 + 43 + 14 + 11 =
  6. 6.29 + 15 + 45 + 52 =
  7. 7.29 + 85 + 56 + 39 =
  8. 8.66 + 16 + 25 + 81 =
  9. 9.81 + 70 + 42 + 24 =
  10. 10.27 + 18 + 51 + 39 =
  11. 11.62 + 85 + 57 + 70 =
  12. 12.21 + 21 + 76 + 56 =
  13. 13.56 + 22 + 19 + 23 =
  14. 14.20 + 43 + 59 + 81 =
  15. 15.42 + 18 + 13 + 78 =
  16. 16.15 + 62 + 59 + 65 =
  17. 17.21 + 29 + 17 + 37 =
  18. 18.79 + 29 + 16 + 44 =
  19. 19.72 + 64 + 50 + 24 =
  20. 20.24 + 24 + 83 + 82 =
  21. 21.45 + 45 + 43 + 60 =
  22. 22.23 + 46 + 66 + 89 =
  23. 23.50 + 44 + 18 + 48 =
  24. 24.26 + 19 + 16 + 33 =
  25. 25.75 + 74 + 84 + 27 =
  26. 26.71 + 50 + 64 + 68 =
  27. 27.71 + 11 + 12 + 74 =
  28. 28.64 + 54 + 62 + 61 =
  29. 29.37 + 33 + 39 + 51 =
  30. 30.55 + 59 + 40 + 52 =
  31. 31.42 + 81 + 43 + 83 =
  32. 32.49 + 55 + 78 + 56 =
  33. 33.85 + 37 + 89 + 16 =
  34. 34.87 + 57 + 60 + 88 =
  35. 35.20 + 57 + 51 + 58 =
  36. 36.43 + 64 + 45 + 44 =
  37. 37.23 + 65 + 85 + 47 =
  38. 38.26 + 62 + 76 + 71 =
  39. 39.16 + 88 + 40 + 29 =
  40. 40.22 + 76 + 33 + 79 =

Answer key

  1. 210
  2. 183
  3. 147
  4. 237
  5. 141
  6. 141
  7. 209
  8. 188
  9. 217
  10. 135
  11. 274
  12. 174
  13. 120
  14. 203
  15. 151
  16. 201
  17. 104
  18. 168
  19. 210
  20. 213
  21. 193
  22. 224
  23. 160
  24. 94
  25. 260
  26. 253
  27. 168
  28. 241
  29. 160
  30. 206
  31. 249
  32. 238
  33. 227
  34. 292
  35. 186
  36. 196
  37. 220
  38. 235
  39. 173
  40. 210

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