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Mental Addition Worksheet

Speed calculation lesson 5: Running totals · Set 496 · 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. 1.40 + 37 + 79 + 85 =
  2. 2.13 + 48 + 65 + 86 =
  3. 3.19 + 62 + 63 + 85 =
  4. 4.73 + 16 + 63 + 78 =
  5. 5.37 + 42 + 76 + 38 =
  6. 6.33 + 21 + 38 + 61 =
  7. 7.20 + 55 + 14 + 68 =
  8. 8.44 + 86 + 33 + 87 =
  9. 9.29 + 28 + 48 + 67 =
  10. 10.71 + 17 + 61 + 70 =
  11. 11.62 + 71 + 75 + 68 =
  12. 12.11 + 73 + 11 + 53 =
  13. 13.59 + 12 + 25 + 41 =
  14. 14.48 + 30 + 85 + 85 =
  15. 15.41 + 85 + 47 + 17 =
  16. 16.67 + 39 + 60 + 68 =
  17. 17.27 + 12 + 21 + 61 =
  18. 18.86 + 29 + 85 + 35 =
  19. 19.17 + 72 + 56 + 53 =
  20. 20.59 + 30 + 24 + 17 =
  21. 21.56 + 31 + 12 + 35 =
  22. 22.16 + 85 + 49 + 75 =
  23. 23.26 + 66 + 43 + 40 =
  24. 24.28 + 89 + 64 + 57 =
  25. 25.74 + 70 + 43 + 58 =
  26. 26.70 + 68 + 17 + 47 =
  27. 27.53 + 44 + 30 + 26 =
  28. 28.51 + 49 + 87 + 41 =
  29. 29.13 + 23 + 74 + 13 =
  30. 30.64 + 30 + 42 + 41 =
  31. 31.88 + 27 + 73 + 12 =
  32. 32.21 + 15 + 42 + 13 =
  33. 33.24 + 42 + 58 + 74 =
  34. 34.76 + 48 + 55 + 74 =
  35. 35.43 + 31 + 28 + 89 =
  36. 36.27 + 11 + 24 + 18 =
  37. 37.76 + 41 + 31 + 49 =
  38. 38.41 + 62 + 34 + 45 =
  39. 39.53 + 74 + 46 + 60 =
  40. 40.56 + 24 + 38 + 32 =

Answer key

  1. 241
  2. 212
  3. 229
  4. 230
  5. 193
  6. 153
  7. 157
  8. 250
  9. 172
  10. 219
  11. 276
  12. 148
  13. 137
  14. 248
  15. 190
  16. 234
  17. 121
  18. 235
  19. 198
  20. 130
  21. 134
  22. 225
  23. 175
  24. 238
  25. 245
  26. 202
  27. 153
  28. 228
  29. 123
  30. 177
  31. 200
  32. 91
  33. 198
  34. 253
  35. 191
  36. 80
  37. 197
  38. 182
  39. 233
  40. 150

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