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Mental Addition Worksheet

Speed calculation lesson 5: Running totals · Set 367 · 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. 1.85 + 55 + 17 + 38 =
  2. 2.75 + 72 + 31 + 82 =
  3. 3.25 + 81 + 22 + 43 =
  4. 4.63 + 32 + 31 + 55 =
  5. 5.54 + 36 + 46 + 77 =
  6. 6.59 + 72 + 54 + 13 =
  7. 7.46 + 39 + 67 + 17 =
  8. 8.39 + 42 + 57 + 40 =
  9. 9.13 + 32 + 34 + 37 =
  10. 10.22 + 11 + 53 + 40 =
  11. 11.55 + 82 + 60 + 82 =
  12. 12.72 + 40 + 56 + 79 =
  13. 13.14 + 70 + 69 + 12 =
  14. 14.52 + 36 + 68 + 75 =
  15. 15.48 + 49 + 59 + 72 =
  16. 16.63 + 21 + 64 + 34 =
  17. 17.21 + 39 + 25 + 33 =
  18. 18.29 + 16 + 11 + 72 =
  19. 19.60 + 58 + 89 + 73 =
  20. 20.84 + 52 + 24 + 26 =
  21. 21.52 + 54 + 44 + 16 =
  22. 22.59 + 26 + 88 + 85 =
  23. 23.77 + 87 + 35 + 89 =
  24. 24.28 + 74 + 61 + 14 =
  25. 25.13 + 41 + 31 + 77 =
  26. 26.27 + 53 + 13 + 14 =
  27. 27.68 + 33 + 23 + 35 =
  28. 28.23 + 55 + 78 + 34 =
  29. 29.19 + 58 + 35 + 44 =
  30. 30.21 + 86 + 11 + 28 =
  31. 31.13 + 20 + 70 + 85 =
  32. 32.36 + 25 + 14 + 30 =
  33. 33.19 + 32 + 50 + 72 =
  34. 34.18 + 28 + 12 + 50 =
  35. 35.54 + 58 + 85 + 34 =
  36. 36.83 + 40 + 22 + 45 =
  37. 37.65 + 11 + 89 + 53 =
  38. 38.13 + 55 + 79 + 55 =
  39. 39.52 + 63 + 72 + 69 =
  40. 40.22 + 79 + 13 + 28 =

Answer key

  1. 195
  2. 260
  3. 171
  4. 181
  5. 213
  6. 198
  7. 169
  8. 178
  9. 116
  10. 126
  11. 279
  12. 247
  13. 165
  14. 231
  15. 228
  16. 182
  17. 118
  18. 128
  19. 280
  20. 186
  21. 166
  22. 258
  23. 288
  24. 177
  25. 162
  26. 107
  27. 159
  28. 190
  29. 156
  30. 146
  31. 188
  32. 105
  33. 173
  34. 108
  35. 231
  36. 190
  37. 218
  38. 202
  39. 256
  40. 142

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