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Mental Addition Worksheet

Speed calculation lesson 5: Running totals · Set 309 · 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. 1.34 + 15 + 72 + 22 =
  2. 2.26 + 79 + 80 + 89 =
  3. 3.69 + 19 + 41 + 36 =
  4. 4.48 + 61 + 32 + 21 =
  5. 5.48 + 35 + 34 + 54 =
  6. 6.64 + 21 + 80 + 13 =
  7. 7.36 + 64 + 20 + 73 =
  8. 8.78 + 57 + 35 + 52 =
  9. 9.30 + 25 + 81 + 33 =
  10. 10.48 + 31 + 73 + 80 =
  11. 11.73 + 40 + 85 + 37 =
  12. 12.70 + 82 + 20 + 85 =
  13. 13.23 + 78 + 72 + 80 =
  14. 14.25 + 89 + 77 + 61 =
  15. 15.12 + 72 + 52 + 45 =
  16. 16.22 + 31 + 20 + 14 =
  17. 17.42 + 25 + 88 + 53 =
  18. 18.29 + 35 + 41 + 87 =
  19. 19.51 + 71 + 37 + 66 =
  20. 20.24 + 25 + 31 + 86 =
  21. 21.69 + 39 + 32 + 41 =
  22. 22.53 + 28 + 80 + 40 =
  23. 23.24 + 86 + 12 + 17 =
  24. 24.36 + 41 + 55 + 49 =
  25. 25.51 + 48 + 45 + 60 =
  26. 26.52 + 58 + 61 + 43 =
  27. 27.65 + 19 + 19 + 15 =
  28. 28.25 + 57 + 49 + 72 =
  29. 29.81 + 82 + 69 + 81 =
  30. 30.70 + 47 + 22 + 44 =
  31. 31.48 + 27 + 76 + 34 =
  32. 32.72 + 32 + 25 + 68 =
  33. 33.68 + 17 + 31 + 31 =
  34. 34.65 + 36 + 42 + 85 =
  35. 35.48 + 31 + 39 + 46 =
  36. 36.81 + 34 + 30 + 32 =
  37. 37.70 + 20 + 15 + 41 =
  38. 38.32 + 66 + 88 + 17 =
  39. 39.72 + 77 + 19 + 27 =
  40. 40.29 + 71 + 35 + 24 =

Answer key

  1. 143
  2. 274
  3. 165
  4. 162
  5. 171
  6. 178
  7. 193
  8. 222
  9. 169
  10. 232
  11. 235
  12. 257
  13. 253
  14. 252
  15. 181
  16. 87
  17. 208
  18. 192
  19. 225
  20. 166
  21. 181
  22. 201
  23. 139
  24. 181
  25. 204
  26. 214
  27. 118
  28. 203
  29. 313
  30. 183
  31. 185
  32. 197
  33. 147
  34. 228
  35. 164
  36. 177
  37. 146
  38. 203
  39. 195
  40. 159

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