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Mental Addition Worksheet

Speed calculation lesson 5: Running totals · Set 178 · 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 + 81 + 14 + 28 =
  2. 2.20 + 23 + 84 + 42 =
  3. 3.82 + 26 + 17 + 69 =
  4. 4.76 + 47 + 52 + 74 =
  5. 5.22 + 53 + 39 + 45 =
  6. 6.72 + 38 + 80 + 54 =
  7. 7.13 + 22 + 65 + 61 =
  8. 8.33 + 80 + 88 + 73 =
  9. 9.48 + 56 + 66 + 48 =
  10. 10.32 + 77 + 87 + 35 =
  11. 11.61 + 19 + 65 + 27 =
  12. 12.87 + 59 + 40 + 18 =
  13. 13.60 + 15 + 84 + 77 =
  14. 14.42 + 27 + 85 + 28 =
  15. 15.56 + 80 + 35 + 56 =
  16. 16.14 + 88 + 21 + 39 =
  17. 17.12 + 57 + 14 + 88 =
  18. 18.19 + 47 + 51 + 68 =
  19. 19.66 + 66 + 20 + 62 =
  20. 20.75 + 31 + 12 + 39 =
  21. 21.62 + 68 + 16 + 69 =
  22. 22.13 + 11 + 43 + 89 =
  23. 23.63 + 55 + 23 + 28 =
  24. 24.71 + 74 + 35 + 62 =
  25. 25.64 + 33 + 36 + 28 =
  26. 26.43 + 25 + 64 + 42 =
  27. 27.39 + 66 + 11 + 77 =
  28. 28.84 + 50 + 89 + 88 =
  29. 29.16 + 36 + 62 + 78 =
  30. 30.71 + 57 + 22 + 13 =
  31. 31.83 + 54 + 14 + 49 =
  32. 32.87 + 20 + 25 + 14 =
  33. 33.15 + 22 + 74 + 14 =
  34. 34.52 + 51 + 62 + 15 =
  35. 35.89 + 59 + 73 + 58 =
  36. 36.82 + 32 + 38 + 58 =
  37. 37.41 + 29 + 55 + 59 =
  38. 38.73 + 34 + 52 + 34 =
  39. 39.14 + 47 + 50 + 85 =
  40. 40.23 + 72 + 28 + 61 =

Answer key

  1. 144
  2. 169
  3. 194
  4. 249
  5. 159
  6. 244
  7. 161
  8. 274
  9. 218
  10. 231
  11. 172
  12. 204
  13. 236
  14. 182
  15. 227
  16. 162
  17. 171
  18. 185
  19. 214
  20. 157
  21. 215
  22. 156
  23. 169
  24. 242
  25. 161
  26. 174
  27. 193
  28. 311
  29. 192
  30. 163
  31. 200
  32. 146
  33. 125
  34. 180
  35. 279
  36. 210
  37. 184
  38. 193
  39. 196
  40. 184

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