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Mental Addition Worksheet

Speed calculation lesson 5: Running totals · Set 457 · 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. 1.70 + 49 + 31 + 19 =
  2. 2.28 + 64 + 12 + 31 =
  3. 3.85 + 56 + 18 + 52 =
  4. 4.31 + 73 + 57 + 42 =
  5. 5.29 + 58 + 62 + 31 =
  6. 6.64 + 49 + 27 + 13 =
  7. 7.15 + 33 + 65 + 13 =
  8. 8.22 + 33 + 34 + 59 =
  9. 9.79 + 30 + 62 + 64 =
  10. 10.46 + 66 + 18 + 82 =
  11. 11.32 + 86 + 13 + 83 =
  12. 12.78 + 57 + 36 + 68 =
  13. 13.64 + 84 + 44 + 69 =
  14. 14.41 + 63 + 66 + 86 =
  15. 15.58 + 31 + 11 + 61 =
  16. 16.30 + 72 + 43 + 11 =
  17. 17.47 + 54 + 69 + 37 =
  18. 18.74 + 41 + 60 + 54 =
  19. 19.41 + 36 + 32 + 84 =
  20. 20.88 + 80 + 53 + 17 =
  21. 21.73 + 87 + 69 + 58 =
  22. 22.20 + 16 + 35 + 14 =
  23. 23.49 + 46 + 76 + 57 =
  24. 24.71 + 15 + 25 + 48 =
  25. 25.79 + 35 + 27 + 54 =
  26. 26.24 + 72 + 68 + 37 =
  27. 27.89 + 29 + 24 + 45 =
  28. 28.69 + 21 + 36 + 49 =
  29. 29.53 + 75 + 51 + 17 =
  30. 30.28 + 32 + 54 + 75 =
  31. 31.15 + 24 + 30 + 43 =
  32. 32.79 + 45 + 57 + 44 =
  33. 33.36 + 67 + 44 + 83 =
  34. 34.47 + 24 + 54 + 86 =
  35. 35.89 + 60 + 50 + 22 =
  36. 36.31 + 33 + 25 + 77 =
  37. 37.63 + 39 + 85 + 14 =
  38. 38.73 + 25 + 49 + 37 =
  39. 39.53 + 30 + 49 + 77 =
  40. 40.72 + 14 + 13 + 22 =

Answer key

  1. 169
  2. 135
  3. 211
  4. 203
  5. 180
  6. 153
  7. 126
  8. 148
  9. 235
  10. 212
  11. 214
  12. 239
  13. 261
  14. 256
  15. 161
  16. 156
  17. 207
  18. 229
  19. 193
  20. 238
  21. 287
  22. 85
  23. 228
  24. 159
  25. 195
  26. 201
  27. 187
  28. 175
  29. 196
  30. 189
  31. 112
  32. 225
  33. 230
  34. 211
  35. 221
  36. 166
  37. 201
  38. 184
  39. 209
  40. 121

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