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Mental Addition Worksheet

Speed calculation lesson 5: Running totals · Set 348 · 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. 1.84 + 60 + 89 + 85 =
  2. 2.42 + 33 + 26 + 85 =
  3. 3.29 + 33 + 39 + 31 =
  4. 4.87 + 40 + 47 + 29 =
  5. 5.26 + 28 + 68 + 38 =
  6. 6.47 + 32 + 87 + 23 =
  7. 7.73 + 19 + 80 + 73 =
  8. 8.20 + 87 + 11 + 55 =
  9. 9.34 + 50 + 60 + 79 =
  10. 10.11 + 19 + 36 + 81 =
  11. 11.23 + 19 + 51 + 27 =
  12. 12.37 + 75 + 54 + 65 =
  13. 13.11 + 84 + 20 + 29 =
  14. 14.45 + 16 + 75 + 16 =
  15. 15.18 + 30 + 59 + 64 =
  16. 16.59 + 76 + 66 + 40 =
  17. 17.23 + 16 + 35 + 12 =
  18. 18.42 + 35 + 36 + 62 =
  19. 19.49 + 22 + 79 + 37 =
  20. 20.79 + 21 + 85 + 17 =
  21. 21.77 + 72 + 19 + 80 =
  22. 22.57 + 20 + 15 + 40 =
  23. 23.89 + 41 + 41 + 12 =
  24. 24.80 + 65 + 75 + 27 =
  25. 25.78 + 31 + 38 + 12 =
  26. 26.40 + 19 + 50 + 68 =
  27. 27.18 + 46 + 17 + 77 =
  28. 28.12 + 55 + 77 + 89 =
  29. 29.61 + 54 + 16 + 43 =
  30. 30.53 + 33 + 46 + 47 =
  31. 31.29 + 61 + 59 + 47 =
  32. 32.55 + 65 + 43 + 50 =
  33. 33.23 + 80 + 35 + 74 =
  34. 34.61 + 89 + 37 + 87 =
  35. 35.39 + 83 + 60 + 87 =
  36. 36.73 + 86 + 71 + 11 =
  37. 37.51 + 86 + 63 + 33 =
  38. 38.78 + 68 + 61 + 17 =
  39. 39.11 + 25 + 27 + 63 =
  40. 40.81 + 34 + 47 + 65 =

Answer key

  1. 318
  2. 186
  3. 132
  4. 203
  5. 160
  6. 189
  7. 245
  8. 173
  9. 223
  10. 147
  11. 120
  12. 231
  13. 144
  14. 152
  15. 171
  16. 241
  17. 86
  18. 175
  19. 187
  20. 202
  21. 248
  22. 132
  23. 183
  24. 247
  25. 159
  26. 177
  27. 158
  28. 233
  29. 174
  30. 179
  31. 196
  32. 213
  33. 212
  34. 274
  35. 269
  36. 241
  37. 233
  38. 224
  39. 126
  40. 227

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