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Mental Addition Worksheet

Speed calculation lesson 5: Running totals · Set 430 · 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. 1.46 + 89 + 41 + 82 =
  2. 2.25 + 50 + 23 + 24 =
  3. 3.11 + 50 + 78 + 79 =
  4. 4.14 + 32 + 80 + 82 =
  5. 5.83 + 57 + 72 + 71 =
  6. 6.60 + 63 + 38 + 19 =
  7. 7.11 + 54 + 15 + 33 =
  8. 8.58 + 66 + 86 + 44 =
  9. 9.58 + 69 + 11 + 84 =
  10. 10.41 + 28 + 11 + 66 =
  11. 11.65 + 33 + 14 + 16 =
  12. 12.82 + 30 + 19 + 51 =
  13. 13.15 + 63 + 22 + 42 =
  14. 14.37 + 32 + 30 + 49 =
  15. 15.61 + 15 + 26 + 85 =
  16. 16.33 + 12 + 44 + 18 =
  17. 17.51 + 51 + 27 + 33 =
  18. 18.76 + 11 + 19 + 58 =
  19. 19.16 + 48 + 41 + 36 =
  20. 20.26 + 13 + 71 + 21 =
  21. 21.61 + 35 + 24 + 71 =
  22. 22.34 + 29 + 73 + 57 =
  23. 23.67 + 14 + 20 + 51 =
  24. 24.86 + 71 + 88 + 47 =
  25. 25.82 + 18 + 71 + 36 =
  26. 26.28 + 22 + 79 + 61 =
  27. 27.65 + 32 + 22 + 20 =
  28. 28.86 + 46 + 55 + 42 =
  29. 29.48 + 27 + 28 + 37 =
  30. 30.67 + 50 + 16 + 87 =
  31. 31.14 + 79 + 46 + 69 =
  32. 32.73 + 89 + 30 + 24 =
  33. 33.54 + 62 + 27 + 23 =
  34. 34.55 + 76 + 70 + 16 =
  35. 35.59 + 30 + 48 + 42 =
  36. 36.35 + 36 + 54 + 15 =
  37. 37.29 + 48 + 54 + 82 =
  38. 38.64 + 43 + 29 + 23 =
  39. 39.44 + 64 + 34 + 19 =
  40. 40.44 + 86 + 55 + 12 =

Answer key

  1. 258
  2. 122
  3. 218
  4. 208
  5. 283
  6. 180
  7. 113
  8. 254
  9. 222
  10. 146
  11. 128
  12. 182
  13. 142
  14. 148
  15. 187
  16. 107
  17. 162
  18. 164
  19. 141
  20. 131
  21. 191
  22. 193
  23. 152
  24. 292
  25. 207
  26. 190
  27. 139
  28. 229
  29. 140
  30. 220
  31. 208
  32. 216
  33. 166
  34. 217
  35. 179
  36. 140
  37. 213
  38. 159
  39. 161
  40. 197

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