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Mental Addition Worksheet

Speed calculation lesson 5: Running totals · Set 245 · 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. 1.30 + 11 + 19 + 26 =
  2. 2.24 + 14 + 28 + 78 =
  3. 3.68 + 35 + 69 + 24 =
  4. 4.58 + 39 + 24 + 31 =
  5. 5.40 + 58 + 87 + 28 =
  6. 6.83 + 31 + 78 + 44 =
  7. 7.71 + 67 + 30 + 19 =
  8. 8.76 + 11 + 88 + 58 =
  9. 9.16 + 16 + 15 + 13 =
  10. 10.13 + 76 + 19 + 32 =
  11. 11.67 + 26 + 12 + 65 =
  12. 12.34 + 84 + 32 + 66 =
  13. 13.67 + 85 + 42 + 30 =
  14. 14.81 + 14 + 43 + 34 =
  15. 15.54 + 32 + 59 + 33 =
  16. 16.32 + 85 + 31 + 58 =
  17. 17.27 + 59 + 74 + 50 =
  18. 18.43 + 63 + 12 + 78 =
  19. 19.77 + 15 + 27 + 55 =
  20. 20.18 + 84 + 49 + 22 =
  21. 21.43 + 45 + 54 + 60 =
  22. 22.49 + 52 + 52 + 60 =
  23. 23.17 + 65 + 54 + 39 =
  24. 24.26 + 18 + 82 + 68 =
  25. 25.68 + 82 + 21 + 82 =
  26. 26.31 + 85 + 55 + 24 =
  27. 27.25 + 82 + 80 + 62 =
  28. 28.74 + 23 + 65 + 40 =
  29. 29.54 + 32 + 89 + 45 =
  30. 30.84 + 57 + 86 + 38 =
  31. 31.72 + 33 + 21 + 33 =
  32. 32.61 + 73 + 29 + 37 =
  33. 33.72 + 30 + 75 + 40 =
  34. 34.47 + 86 + 17 + 89 =
  35. 35.49 + 40 + 40 + 19 =
  36. 36.22 + 41 + 13 + 24 =
  37. 37.58 + 55 + 60 + 28 =
  38. 38.81 + 89 + 24 + 89 =
  39. 39.22 + 51 + 49 + 14 =
  40. 40.67 + 86 + 44 + 41 =

Answer key

  1. 86
  2. 144
  3. 196
  4. 152
  5. 213
  6. 236
  7. 187
  8. 233
  9. 60
  10. 140
  11. 170
  12. 216
  13. 224
  14. 172
  15. 178
  16. 206
  17. 210
  18. 196
  19. 174
  20. 173
  21. 202
  22. 213
  23. 175
  24. 194
  25. 253
  26. 195
  27. 249
  28. 202
  29. 220
  30. 265
  31. 159
  32. 200
  33. 217
  34. 239
  35. 148
  36. 100
  37. 201
  38. 283
  39. 136
  40. 238

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