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Mental Addition Worksheet

Speed calculation lesson 5: Running totals · Set 639 · 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. 1.55 + 36 + 37 + 87 =
  2. 2.48 + 63 + 83 + 83 =
  3. 3.15 + 69 + 72 + 33 =
  4. 4.58 + 28 + 60 + 64 =
  5. 5.49 + 63 + 28 + 45 =
  6. 6.58 + 62 + 17 + 79 =
  7. 7.31 + 48 + 18 + 81 =
  8. 8.41 + 84 + 87 + 59 =
  9. 9.21 + 40 + 58 + 44 =
  10. 10.15 + 18 + 14 + 75 =
  11. 11.48 + 37 + 43 + 40 =
  12. 12.72 + 21 + 56 + 40 =
  13. 13.27 + 68 + 21 + 13 =
  14. 14.50 + 77 + 41 + 62 =
  15. 15.16 + 87 + 52 + 37 =
  16. 16.22 + 64 + 39 + 50 =
  17. 17.16 + 76 + 60 + 13 =
  18. 18.30 + 31 + 81 + 77 =
  19. 19.85 + 78 + 31 + 41 =
  20. 20.44 + 40 + 33 + 19 =
  21. 21.87 + 78 + 48 + 17 =
  22. 22.82 + 16 + 61 + 72 =
  23. 23.61 + 72 + 85 + 46 =
  24. 24.47 + 80 + 16 + 79 =
  25. 25.19 + 23 + 35 + 62 =
  26. 26.44 + 37 + 86 + 55 =
  27. 27.30 + 78 + 79 + 42 =
  28. 28.59 + 21 + 71 + 73 =
  29. 29.46 + 63 + 19 + 41 =
  30. 30.41 + 11 + 32 + 75 =
  31. 31.26 + 46 + 57 + 25 =
  32. 32.71 + 71 + 36 + 65 =
  33. 33.56 + 54 + 43 + 11 =
  34. 34.29 + 11 + 84 + 73 =
  35. 35.75 + 86 + 17 + 35 =
  36. 36.26 + 51 + 89 + 65 =
  37. 37.51 + 20 + 47 + 82 =
  38. 38.87 + 40 + 55 + 63 =
  39. 39.82 + 16 + 74 + 61 =
  40. 40.59 + 11 + 11 + 21 =

Answer key

  1. 215
  2. 277
  3. 189
  4. 210
  5. 185
  6. 216
  7. 178
  8. 271
  9. 163
  10. 122
  11. 168
  12. 189
  13. 129
  14. 230
  15. 192
  16. 175
  17. 165
  18. 219
  19. 235
  20. 136
  21. 230
  22. 231
  23. 264
  24. 222
  25. 139
  26. 222
  27. 229
  28. 224
  29. 169
  30. 159
  31. 154
  32. 243
  33. 164
  34. 197
  35. 213
  36. 231
  37. 200
  38. 245
  39. 233
  40. 102

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