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Mental Addition Worksheet

Speed calculation lesson 5: Running totals · Set 753 · 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. 1.49 + 13 + 53 + 56 =
  2. 2.35 + 20 + 12 + 52 =
  3. 3.63 + 81 + 25 + 16 =
  4. 4.35 + 54 + 35 + 27 =
  5. 5.28 + 35 + 17 + 71 =
  6. 6.54 + 73 + 32 + 89 =
  7. 7.28 + 36 + 58 + 88 =
  8. 8.30 + 62 + 39 + 39 =
  9. 9.48 + 14 + 65 + 23 =
  10. 10.83 + 74 + 48 + 21 =
  11. 11.43 + 37 + 58 + 49 =
  12. 12.47 + 62 + 17 + 16 =
  13. 13.20 + 28 + 35 + 27 =
  14. 14.63 + 16 + 72 + 24 =
  15. 15.23 + 20 + 31 + 19 =
  16. 16.74 + 19 + 18 + 87 =
  17. 17.64 + 62 + 73 + 65 =
  18. 18.16 + 21 + 81 + 63 =
  19. 19.58 + 60 + 28 + 44 =
  20. 20.59 + 24 + 86 + 80 =
  21. 21.35 + 24 + 78 + 38 =
  22. 22.50 + 83 + 74 + 39 =
  23. 23.43 + 85 + 63 + 43 =
  24. 24.24 + 19 + 37 + 54 =
  25. 25.25 + 21 + 21 + 33 =
  26. 26.60 + 70 + 43 + 40 =
  27. 27.33 + 58 + 33 + 79 =
  28. 28.45 + 16 + 31 + 64 =
  29. 29.42 + 16 + 12 + 59 =
  30. 30.26 + 42 + 21 + 60 =
  31. 31.21 + 45 + 34 + 66 =
  32. 32.26 + 52 + 60 + 14 =
  33. 33.87 + 49 + 33 + 54 =
  34. 34.54 + 25 + 77 + 83 =
  35. 35.72 + 81 + 56 + 50 =
  36. 36.12 + 30 + 37 + 42 =
  37. 37.71 + 70 + 68 + 25 =
  38. 38.37 + 82 + 37 + 55 =
  39. 39.68 + 71 + 26 + 14 =
  40. 40.48 + 11 + 59 + 24 =

Answer key

  1. 171
  2. 119
  3. 185
  4. 151
  5. 151
  6. 248
  7. 210
  8. 170
  9. 150
  10. 226
  11. 187
  12. 142
  13. 110
  14. 175
  15. 93
  16. 198
  17. 264
  18. 181
  19. 190
  20. 249
  21. 175
  22. 246
  23. 234
  24. 134
  25. 100
  26. 213
  27. 203
  28. 156
  29. 129
  30. 149
  31. 166
  32. 152
  33. 223
  34. 239
  35. 259
  36. 121
  37. 234
  38. 211
  39. 179
  40. 142

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