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Mental Addition Worksheet

Speed calculation lesson 5: Running totals · Set 64 · 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. 1.82 + 80 + 22 + 70 =
  2. 2.19 + 61 + 79 + 63 =
  3. 3.39 + 21 + 31 + 56 =
  4. 4.70 + 44 + 18 + 60 =
  5. 5.53 + 83 + 54 + 57 =
  6. 6.45 + 65 + 16 + 35 =
  7. 7.51 + 24 + 50 + 69 =
  8. 8.60 + 53 + 21 + 75 =
  9. 9.36 + 14 + 29 + 26 =
  10. 10.34 + 51 + 80 + 74 =
  11. 11.21 + 63 + 15 + 87 =
  12. 12.13 + 79 + 21 + 42 =
  13. 13.37 + 87 + 85 + 51 =
  14. 14.31 + 82 + 76 + 48 =
  15. 15.14 + 83 + 87 + 65 =
  16. 16.25 + 74 + 42 + 55 =
  17. 17.88 + 24 + 65 + 49 =
  18. 18.33 + 42 + 76 + 13 =
  19. 19.59 + 38 + 32 + 74 =
  20. 20.44 + 68 + 16 + 86 =
  21. 21.55 + 16 + 31 + 51 =
  22. 22.48 + 33 + 49 + 66 =
  23. 23.28 + 64 + 40 + 61 =
  24. 24.21 + 79 + 76 + 81 =
  25. 25.21 + 24 + 83 + 86 =
  26. 26.54 + 53 + 67 + 81 =
  27. 27.64 + 33 + 24 + 12 =
  28. 28.64 + 60 + 36 + 77 =
  29. 29.53 + 18 + 79 + 17 =
  30. 30.53 + 38 + 19 + 31 =
  31. 31.25 + 35 + 61 + 64 =
  32. 32.55 + 19 + 24 + 31 =
  33. 33.54 + 66 + 40 + 21 =
  34. 34.58 + 60 + 44 + 56 =
  35. 35.36 + 30 + 73 + 39 =
  36. 36.29 + 48 + 64 + 13 =
  37. 37.88 + 34 + 89 + 73 =
  38. 38.31 + 75 + 74 + 32 =
  39. 39.28 + 22 + 50 + 19 =
  40. 40.22 + 68 + 16 + 83 =

Answer key

  1. 254
  2. 222
  3. 147
  4. 192
  5. 247
  6. 161
  7. 194
  8. 209
  9. 105
  10. 239
  11. 186
  12. 155
  13. 260
  14. 237
  15. 249
  16. 196
  17. 226
  18. 164
  19. 203
  20. 214
  21. 153
  22. 196
  23. 193
  24. 257
  25. 214
  26. 255
  27. 133
  28. 237
  29. 167
  30. 141
  31. 185
  32. 129
  33. 181
  34. 218
  35. 178
  36. 154
  37. 284
  38. 212
  39. 119
  40. 189

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