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Mental Addition Worksheet

Speed calculation lesson 5: Running totals · Set 99 · 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. 1.52 + 81 + 66 + 80 =
  2. 2.86 + 22 + 49 + 77 =
  3. 3.53 + 74 + 31 + 61 =
  4. 4.57 + 24 + 76 + 28 =
  5. 5.15 + 14 + 27 + 61 =
  6. 6.21 + 13 + 85 + 35 =
  7. 7.38 + 46 + 24 + 30 =
  8. 8.18 + 29 + 49 + 83 =
  9. 9.65 + 36 + 74 + 73 =
  10. 10.77 + 46 + 51 + 71 =
  11. 11.20 + 82 + 48 + 63 =
  12. 12.14 + 33 + 86 + 70 =
  13. 13.34 + 63 + 87 + 63 =
  14. 14.83 + 67 + 34 + 39 =
  15. 15.26 + 29 + 71 + 49 =
  16. 16.26 + 36 + 25 + 82 =
  17. 17.24 + 34 + 29 + 15 =
  18. 18.53 + 46 + 28 + 22 =
  19. 19.35 + 56 + 84 + 39 =
  20. 20.77 + 71 + 64 + 44 =
  21. 21.88 + 67 + 65 + 49 =
  22. 22.58 + 22 + 26 + 54 =
  23. 23.51 + 82 + 89 + 87 =
  24. 24.46 + 72 + 74 + 30 =
  25. 25.40 + 30 + 33 + 23 =
  26. 26.74 + 43 + 48 + 40 =
  27. 27.53 + 78 + 51 + 49 =
  28. 28.68 + 32 + 76 + 58 =
  29. 29.22 + 20 + 71 + 15 =
  30. 30.66 + 22 + 39 + 55 =
  31. 31.32 + 13 + 31 + 69 =
  32. 32.83 + 59 + 83 + 71 =
  33. 33.23 + 29 + 67 + 31 =
  34. 34.82 + 24 + 37 + 51 =
  35. 35.22 + 78 + 55 + 73 =
  36. 36.22 + 62 + 36 + 18 =
  37. 37.11 + 62 + 40 + 36 =
  38. 38.54 + 74 + 24 + 87 =
  39. 39.11 + 30 + 66 + 23 =
  40. 40.85 + 12 + 71 + 72 =

Answer key

  1. 279
  2. 234
  3. 219
  4. 185
  5. 117
  6. 154
  7. 138
  8. 179
  9. 248
  10. 245
  11. 213
  12. 203
  13. 247
  14. 223
  15. 175
  16. 169
  17. 102
  18. 149
  19. 214
  20. 256
  21. 269
  22. 160
  23. 309
  24. 222
  25. 126
  26. 205
  27. 231
  28. 234
  29. 128
  30. 182
  31. 145
  32. 296
  33. 150
  34. 194
  35. 228
  36. 138
  37. 149
  38. 239
  39. 130
  40. 240

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