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Mental Addition Worksheet

Speed calculation lesson 5: Running totals · Set 591 · 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. 1.36 + 81 + 23 + 40 =
  2. 2.88 + 15 + 74 + 24 =
  3. 3.39 + 24 + 55 + 59 =
  4. 4.40 + 85 + 24 + 65 =
  5. 5.14 + 45 + 69 + 49 =
  6. 6.69 + 13 + 23 + 59 =
  7. 7.15 + 62 + 27 + 51 =
  8. 8.57 + 22 + 52 + 19 =
  9. 9.11 + 21 + 23 + 68 =
  10. 10.28 + 36 + 50 + 12 =
  11. 11.16 + 78 + 22 + 70 =
  12. 12.17 + 80 + 14 + 56 =
  13. 13.46 + 32 + 58 + 52 =
  14. 14.28 + 87 + 62 + 88 =
  15. 15.13 + 48 + 26 + 48 =
  16. 16.74 + 38 + 72 + 84 =
  17. 17.29 + 17 + 67 + 63 =
  18. 18.42 + 45 + 11 + 40 =
  19. 19.46 + 31 + 28 + 64 =
  20. 20.30 + 52 + 35 + 29 =
  21. 21.85 + 22 + 88 + 37 =
  22. 22.11 + 36 + 74 + 12 =
  23. 23.47 + 44 + 18 + 35 =
  24. 24.28 + 85 + 49 + 16 =
  25. 25.26 + 58 + 60 + 28 =
  26. 26.64 + 84 + 20 + 21 =
  27. 27.15 + 50 + 47 + 86 =
  28. 28.33 + 63 + 16 + 42 =
  29. 29.55 + 58 + 57 + 32 =
  30. 30.63 + 70 + 20 + 87 =
  31. 31.23 + 80 + 44 + 75 =
  32. 32.65 + 44 + 31 + 17 =
  33. 33.38 + 71 + 69 + 66 =
  34. 34.81 + 43 + 65 + 76 =
  35. 35.20 + 49 + 78 + 48 =
  36. 36.36 + 26 + 60 + 19 =
  37. 37.31 + 88 + 56 + 54 =
  38. 38.65 + 35 + 15 + 51 =
  39. 39.53 + 43 + 47 + 25 =
  40. 40.71 + 80 + 88 + 60 =

Answer key

  1. 180
  2. 201
  3. 177
  4. 214
  5. 177
  6. 164
  7. 155
  8. 150
  9. 123
  10. 126
  11. 186
  12. 167
  13. 188
  14. 265
  15. 135
  16. 268
  17. 176
  18. 138
  19. 169
  20. 146
  21. 232
  22. 133
  23. 144
  24. 178
  25. 172
  26. 189
  27. 198
  28. 154
  29. 202
  30. 240
  31. 222
  32. 157
  33. 244
  34. 265
  35. 195
  36. 141
  37. 229
  38. 166
  39. 168
  40. 299

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