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Mental Addition Worksheet

Speed calculation lesson 5: Running totals · Set 797 · 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. 1.60 + 73 + 69 + 51 =
  2. 2.20 + 17 + 38 + 23 =
  3. 3.39 + 89 + 23 + 79 =
  4. 4.67 + 61 + 61 + 11 =
  5. 5.17 + 25 + 20 + 15 =
  6. 6.13 + 50 + 87 + 86 =
  7. 7.72 + 40 + 71 + 73 =
  8. 8.15 + 74 + 31 + 42 =
  9. 9.14 + 61 + 23 + 63 =
  10. 10.33 + 48 + 71 + 57 =
  11. 11.25 + 31 + 42 + 44 =
  12. 12.45 + 69 + 30 + 84 =
  13. 13.13 + 75 + 78 + 69 =
  14. 14.27 + 15 + 20 + 55 =
  15. 15.38 + 54 + 24 + 18 =
  16. 16.48 + 60 + 29 + 38 =
  17. 17.83 + 30 + 58 + 21 =
  18. 18.82 + 78 + 59 + 13 =
  19. 19.89 + 45 + 18 + 59 =
  20. 20.77 + 84 + 57 + 88 =
  21. 21.27 + 58 + 79 + 15 =
  22. 22.76 + 29 + 68 + 26 =
  23. 23.32 + 79 + 61 + 80 =
  24. 24.12 + 53 + 31 + 84 =
  25. 25.72 + 23 + 68 + 71 =
  26. 26.40 + 37 + 79 + 48 =
  27. 27.57 + 35 + 29 + 36 =
  28. 28.48 + 68 + 77 + 35 =
  29. 29.74 + 65 + 64 + 46 =
  30. 30.14 + 68 + 60 + 34 =
  31. 31.49 + 18 + 54 + 29 =
  32. 32.20 + 34 + 59 + 74 =
  33. 33.18 + 46 + 75 + 82 =
  34. 34.40 + 48 + 16 + 38 =
  35. 35.85 + 69 + 36 + 63 =
  36. 36.71 + 31 + 76 + 66 =
  37. 37.75 + 71 + 58 + 56 =
  38. 38.88 + 53 + 69 + 55 =
  39. 39.83 + 29 + 89 + 77 =
  40. 40.86 + 86 + 15 + 59 =

Answer key

  1. 253
  2. 98
  3. 230
  4. 200
  5. 77
  6. 236
  7. 256
  8. 162
  9. 161
  10. 209
  11. 142
  12. 228
  13. 235
  14. 117
  15. 134
  16. 175
  17. 192
  18. 232
  19. 211
  20. 306
  21. 179
  22. 199
  23. 252
  24. 180
  25. 234
  26. 204
  27. 157
  28. 228
  29. 249
  30. 176
  31. 150
  32. 187
  33. 221
  34. 142
  35. 253
  36. 244
  37. 260
  38. 265
  39. 278
  40. 246

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