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Mental Addition Worksheet

Speed calculation lesson 5: Running totals · Set 40 · 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. 1.16 + 88 + 84 + 80 =
  2. 2.81 + 12 + 44 + 52 =
  3. 3.74 + 74 + 50 + 70 =
  4. 4.69 + 64 + 34 + 48 =
  5. 5.36 + 69 + 16 + 77 =
  6. 6.89 + 88 + 41 + 19 =
  7. 7.19 + 31 + 18 + 79 =
  8. 8.63 + 18 + 66 + 28 =
  9. 9.16 + 37 + 31 + 21 =
  10. 10.29 + 35 + 64 + 30 =
  11. 11.61 + 81 + 61 + 28 =
  12. 12.14 + 25 + 45 + 73 =
  13. 13.76 + 69 + 88 + 68 =
  14. 14.32 + 73 + 22 + 58 =
  15. 15.86 + 59 + 42 + 34 =
  16. 16.72 + 16 + 21 + 71 =
  17. 17.26 + 19 + 23 + 39 =
  18. 18.11 + 78 + 39 + 12 =
  19. 19.15 + 80 + 32 + 21 =
  20. 20.62 + 61 + 68 + 74 =
  21. 21.74 + 18 + 18 + 40 =
  22. 22.11 + 37 + 38 + 55 =
  23. 23.22 + 68 + 41 + 88 =
  24. 24.47 + 13 + 53 + 19 =
  25. 25.51 + 47 + 51 + 35 =
  26. 26.24 + 64 + 56 + 75 =
  27. 27.59 + 15 + 16 + 56 =
  28. 28.11 + 24 + 52 + 57 =
  29. 29.34 + 62 + 71 + 31 =
  30. 30.88 + 14 + 24 + 20 =
  31. 31.12 + 24 + 47 + 58 =
  32. 32.40 + 38 + 56 + 12 =
  33. 33.72 + 51 + 39 + 17 =
  34. 34.37 + 37 + 32 + 13 =
  35. 35.57 + 86 + 66 + 21 =
  36. 36.85 + 58 + 68 + 13 =
  37. 37.78 + 86 + 75 + 39 =
  38. 38.30 + 32 + 31 + 70 =
  39. 39.40 + 68 + 69 + 12 =
  40. 40.71 + 45 + 51 + 88 =

Answer key

  1. 268
  2. 189
  3. 268
  4. 215
  5. 198
  6. 237
  7. 147
  8. 175
  9. 105
  10. 158
  11. 231
  12. 157
  13. 301
  14. 185
  15. 221
  16. 180
  17. 107
  18. 140
  19. 148
  20. 265
  21. 150
  22. 141
  23. 219
  24. 132
  25. 184
  26. 219
  27. 146
  28. 144
  29. 198
  30. 146
  31. 141
  32. 146
  33. 179
  34. 119
  35. 230
  36. 224
  37. 278
  38. 163
  39. 189
  40. 255

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