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Mental Addition Worksheet

Speed calculation lesson 5: Running totals · Set 510 · 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. 1.21 + 28 + 39 + 16 =
  2. 2.32 + 44 + 51 + 53 =
  3. 3.38 + 44 + 15 + 32 =
  4. 4.45 + 83 + 41 + 34 =
  5. 5.77 + 84 + 23 + 34 =
  6. 6.78 + 29 + 47 + 70 =
  7. 7.26 + 66 + 61 + 74 =
  8. 8.61 + 79 + 52 + 62 =
  9. 9.65 + 34 + 19 + 84 =
  10. 10.22 + 34 + 78 + 14 =
  11. 11.65 + 11 + 46 + 13 =
  12. 12.73 + 88 + 81 + 70 =
  13. 13.25 + 36 + 22 + 16 =
  14. 14.69 + 31 + 43 + 84 =
  15. 15.50 + 73 + 31 + 42 =
  16. 16.35 + 55 + 63 + 76 =
  17. 17.30 + 37 + 52 + 52 =
  18. 18.39 + 19 + 75 + 21 =
  19. 19.45 + 48 + 50 + 62 =
  20. 20.44 + 19 + 89 + 23 =
  21. 21.50 + 55 + 49 + 22 =
  22. 22.83 + 11 + 83 + 75 =
  23. 23.72 + 30 + 74 + 16 =
  24. 24.63 + 34 + 62 + 77 =
  25. 25.75 + 72 + 70 + 27 =
  26. 26.13 + 66 + 61 + 44 =
  27. 27.70 + 20 + 25 + 15 =
  28. 28.11 + 44 + 34 + 63 =
  29. 29.66 + 54 + 79 + 50 =
  30. 30.69 + 13 + 88 + 52 =
  31. 31.57 + 18 + 19 + 83 =
  32. 32.51 + 45 + 77 + 77 =
  33. 33.63 + 71 + 69 + 26 =
  34. 34.79 + 48 + 69 + 17 =
  35. 35.51 + 66 + 74 + 88 =
  36. 36.47 + 61 + 73 + 52 =
  37. 37.50 + 27 + 23 + 32 =
  38. 38.48 + 39 + 71 + 20 =
  39. 39.22 + 60 + 64 + 17 =
  40. 40.18 + 64 + 21 + 86 =

Answer key

  1. 104
  2. 180
  3. 129
  4. 203
  5. 218
  6. 224
  7. 227
  8. 254
  9. 202
  10. 148
  11. 135
  12. 312
  13. 99
  14. 227
  15. 196
  16. 229
  17. 171
  18. 154
  19. 205
  20. 175
  21. 176
  22. 252
  23. 192
  24. 236
  25. 244
  26. 184
  27. 130
  28. 152
  29. 249
  30. 222
  31. 177
  32. 250
  33. 229
  34. 213
  35. 279
  36. 233
  37. 132
  38. 178
  39. 163
  40. 189

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