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Mental Addition Worksheet

Speed calculation lesson 5: Running totals · Set 63 · 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. 1.22 + 51 + 17 + 28 =
  2. 2.84 + 20 + 28 + 52 =
  3. 3.75 + 65 + 17 + 36 =
  4. 4.57 + 65 + 69 + 42 =
  5. 5.87 + 46 + 46 + 48 =
  6. 6.58 + 37 + 25 + 79 =
  7. 7.58 + 27 + 57 + 50 =
  8. 8.27 + 55 + 13 + 89 =
  9. 9.17 + 33 + 21 + 70 =
  10. 10.44 + 84 + 21 + 66 =
  11. 11.15 + 24 + 49 + 26 =
  12. 12.74 + 30 + 15 + 30 =
  13. 13.40 + 56 + 52 + 73 =
  14. 14.86 + 42 + 34 + 13 =
  15. 15.11 + 13 + 63 + 48 =
  16. 16.70 + 21 + 76 + 19 =
  17. 17.58 + 68 + 45 + 13 =
  18. 18.53 + 72 + 56 + 14 =
  19. 19.14 + 67 + 18 + 29 =
  20. 20.85 + 88 + 65 + 28 =
  21. 21.29 + 74 + 12 + 70 =
  22. 22.87 + 34 + 39 + 47 =
  23. 23.65 + 48 + 58 + 20 =
  24. 24.37 + 48 + 16 + 37 =
  25. 25.53 + 41 + 63 + 88 =
  26. 26.11 + 24 + 43 + 37 =
  27. 27.17 + 30 + 67 + 25 =
  28. 28.14 + 42 + 21 + 48 =
  29. 29.64 + 37 + 16 + 83 =
  30. 30.33 + 74 + 46 + 27 =
  31. 31.44 + 15 + 51 + 42 =
  32. 32.11 + 77 + 34 + 81 =
  33. 33.17 + 83 + 25 + 24 =
  34. 34.86 + 15 + 42 + 56 =
  35. 35.64 + 11 + 63 + 28 =
  36. 36.22 + 38 + 76 + 46 =
  37. 37.66 + 51 + 33 + 47 =
  38. 38.33 + 20 + 79 + 46 =
  39. 39.39 + 77 + 29 + 56 =
  40. 40.69 + 16 + 26 + 68 =

Answer key

  1. 118
  2. 184
  3. 193
  4. 233
  5. 227
  6. 199
  7. 192
  8. 184
  9. 141
  10. 215
  11. 114
  12. 149
  13. 221
  14. 175
  15. 135
  16. 186
  17. 184
  18. 195
  19. 128
  20. 266
  21. 185
  22. 207
  23. 191
  24. 138
  25. 245
  26. 115
  27. 139
  28. 125
  29. 200
  30. 180
  31. 152
  32. 203
  33. 149
  34. 199
  35. 166
  36. 182
  37. 197
  38. 178
  39. 201
  40. 179

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