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Mental Addition Worksheet

Speed calculation lesson 5: Running totals · Set 538 · 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. 1.76 + 62 + 72 + 37 =
  2. 2.13 + 31 + 80 + 35 =
  3. 3.52 + 77 + 13 + 85 =
  4. 4.15 + 71 + 58 + 30 =
  5. 5.56 + 49 + 60 + 68 =
  6. 6.34 + 73 + 80 + 15 =
  7. 7.22 + 58 + 48 + 60 =
  8. 8.39 + 26 + 57 + 16 =
  9. 9.86 + 34 + 38 + 76 =
  10. 10.70 + 23 + 32 + 12 =
  11. 11.26 + 61 + 77 + 11 =
  12. 12.28 + 75 + 18 + 70 =
  13. 13.56 + 56 + 40 + 81 =
  14. 14.77 + 79 + 13 + 86 =
  15. 15.46 + 33 + 87 + 56 =
  16. 16.20 + 31 + 31 + 51 =
  17. 17.77 + 43 + 67 + 16 =
  18. 18.73 + 17 + 45 + 17 =
  19. 19.59 + 85 + 15 + 49 =
  20. 20.30 + 30 + 78 + 29 =
  21. 21.18 + 80 + 34 + 53 =
  22. 22.13 + 62 + 75 + 47 =
  23. 23.66 + 46 + 59 + 52 =
  24. 24.24 + 77 + 54 + 43 =
  25. 25.13 + 85 + 34 + 39 =
  26. 26.43 + 29 + 26 + 57 =
  27. 27.18 + 27 + 18 + 86 =
  28. 28.67 + 23 + 52 + 72 =
  29. 29.83 + 60 + 62 + 11 =
  30. 30.52 + 42 + 45 + 87 =
  31. 31.11 + 67 + 56 + 20 =
  32. 32.74 + 44 + 20 + 24 =
  33. 33.35 + 24 + 53 + 69 =
  34. 34.58 + 15 + 30 + 66 =
  35. 35.63 + 70 + 77 + 17 =
  36. 36.84 + 64 + 78 + 85 =
  37. 37.11 + 73 + 85 + 54 =
  38. 38.21 + 20 + 14 + 57 =
  39. 39.47 + 27 + 44 + 29 =
  40. 40.86 + 87 + 76 + 27 =

Answer key

  1. 247
  2. 159
  3. 227
  4. 174
  5. 233
  6. 202
  7. 188
  8. 138
  9. 234
  10. 137
  11. 175
  12. 191
  13. 233
  14. 255
  15. 222
  16. 133
  17. 203
  18. 152
  19. 208
  20. 167
  21. 185
  22. 197
  23. 223
  24. 198
  25. 171
  26. 155
  27. 149
  28. 214
  29. 216
  30. 226
  31. 154
  32. 162
  33. 181
  34. 169
  35. 227
  36. 311
  37. 223
  38. 112
  39. 147
  40. 276

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