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Mental Addition Worksheet

Speed calculation lesson 5: Running totals · Set 140 · 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 + 76 + 77 + 19 =
  2. 2.85 + 42 + 11 + 29 =
  3. 3.65 + 60 + 71 + 18 =
  4. 4.36 + 38 + 28 + 83 =
  5. 5.29 + 68 + 41 + 47 =
  6. 6.40 + 43 + 47 + 39 =
  7. 7.68 + 44 + 16 + 24 =
  8. 8.33 + 80 + 61 + 13 =
  9. 9.23 + 23 + 68 + 70 =
  10. 10.42 + 44 + 18 + 11 =
  11. 11.25 + 19 + 87 + 37 =
  12. 12.79 + 75 + 58 + 18 =
  13. 13.80 + 16 + 13 + 85 =
  14. 14.21 + 63 + 31 + 76 =
  15. 15.54 + 48 + 89 + 22 =
  16. 16.31 + 15 + 34 + 18 =
  17. 17.83 + 23 + 43 + 56 =
  18. 18.16 + 70 + 55 + 12 =
  19. 19.12 + 42 + 56 + 66 =
  20. 20.63 + 48 + 31 + 18 =
  21. 21.15 + 66 + 59 + 76 =
  22. 22.19 + 12 + 17 + 13 =
  23. 23.52 + 40 + 34 + 15 =
  24. 24.31 + 29 + 24 + 55 =
  25. 25.16 + 26 + 62 + 83 =
  26. 26.38 + 84 + 30 + 26 =
  27. 27.20 + 66 + 59 + 44 =
  28. 28.53 + 53 + 30 + 74 =
  29. 29.58 + 14 + 13 + 51 =
  30. 30.51 + 56 + 13 + 28 =
  31. 31.42 + 59 + 18 + 14 =
  32. 32.89 + 37 + 48 + 86 =
  33. 33.80 + 22 + 44 + 22 =
  34. 34.83 + 16 + 72 + 27 =
  35. 35.64 + 57 + 11 + 19 =
  36. 36.85 + 50 + 55 + 55 =
  37. 37.56 + 82 + 79 + 40 =
  38. 38.80 + 31 + 43 + 82 =
  39. 39.75 + 43 + 48 + 65 =
  40. 40.33 + 88 + 14 + 57 =

Answer key

  1. 227
  2. 167
  3. 214
  4. 185
  5. 185
  6. 169
  7. 152
  8. 187
  9. 184
  10. 115
  11. 168
  12. 230
  13. 194
  14. 191
  15. 213
  16. 98
  17. 205
  18. 153
  19. 176
  20. 160
  21. 216
  22. 61
  23. 141
  24. 139
  25. 187
  26. 178
  27. 189
  28. 210
  29. 136
  30. 148
  31. 133
  32. 260
  33. 168
  34. 198
  35. 151
  36. 245
  37. 257
  38. 236
  39. 231
  40. 192

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