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Mental Addition Worksheet

Speed calculation lesson 5: Running totals · Set 104 · 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. 1.41 + 14 + 49 + 61 =
  2. 2.74 + 66 + 79 + 24 =
  3. 3.32 + 75 + 82 + 32 =
  4. 4.41 + 13 + 25 + 16 =
  5. 5.37 + 36 + 51 + 21 =
  6. 6.40 + 13 + 12 + 20 =
  7. 7.30 + 70 + 87 + 22 =
  8. 8.64 + 57 + 64 + 16 =
  9. 9.58 + 53 + 27 + 19 =
  10. 10.61 + 24 + 39 + 62 =
  11. 11.61 + 59 + 68 + 39 =
  12. 12.38 + 12 + 88 + 59 =
  13. 13.59 + 76 + 17 + 70 =
  14. 14.33 + 46 + 42 + 44 =
  15. 15.86 + 67 + 60 + 34 =
  16. 16.58 + 30 + 39 + 80 =
  17. 17.28 + 11 + 63 + 42 =
  18. 18.18 + 26 + 24 + 69 =
  19. 19.65 + 25 + 12 + 24 =
  20. 20.87 + 55 + 56 + 18 =
  21. 21.32 + 73 + 18 + 29 =
  22. 22.71 + 42 + 84 + 44 =
  23. 23.33 + 65 + 82 + 19 =
  24. 24.59 + 82 + 75 + 38 =
  25. 25.39 + 72 + 28 + 43 =
  26. 26.26 + 26 + 43 + 35 =
  27. 27.11 + 59 + 21 + 25 =
  28. 28.79 + 81 + 33 + 65 =
  29. 29.88 + 44 + 73 + 20 =
  30. 30.26 + 22 + 17 + 20 =
  31. 31.16 + 54 + 64 + 47 =
  32. 32.33 + 64 + 39 + 27 =
  33. 33.74 + 37 + 65 + 37 =
  34. 34.22 + 88 + 78 + 33 =
  35. 35.34 + 46 + 19 + 75 =
  36. 36.45 + 49 + 13 + 76 =
  37. 37.21 + 26 + 74 + 47 =
  38. 38.41 + 42 + 45 + 89 =
  39. 39.68 + 27 + 28 + 39 =
  40. 40.86 + 15 + 23 + 45 =

Answer key

  1. 165
  2. 243
  3. 221
  4. 95
  5. 145
  6. 85
  7. 209
  8. 201
  9. 157
  10. 186
  11. 227
  12. 197
  13. 222
  14. 165
  15. 247
  16. 207
  17. 144
  18. 137
  19. 126
  20. 216
  21. 152
  22. 241
  23. 199
  24. 254
  25. 182
  26. 130
  27. 116
  28. 258
  29. 225
  30. 85
  31. 181
  32. 163
  33. 213
  34. 221
  35. 174
  36. 183
  37. 168
  38. 217
  39. 162
  40. 169

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