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Mental Addition Worksheet

Speed calculation lesson 5: Running totals · Set 679 · 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. 1.80 + 77 + 87 + 83 =
  2. 2.50 + 48 + 67 + 41 =
  3. 3.21 + 33 + 56 + 66 =
  4. 4.19 + 13 + 18 + 22 =
  5. 5.14 + 54 + 13 + 59 =
  6. 6.38 + 29 + 85 + 51 =
  7. 7.29 + 30 + 66 + 23 =
  8. 8.78 + 65 + 51 + 72 =
  9. 9.21 + 51 + 26 + 74 =
  10. 10.65 + 30 + 32 + 85 =
  11. 11.22 + 57 + 18 + 30 =
  12. 12.65 + 20 + 52 + 64 =
  13. 13.17 + 45 + 23 + 64 =
  14. 14.25 + 62 + 37 + 28 =
  15. 15.71 + 28 + 43 + 23 =
  16. 16.79 + 57 + 18 + 68 =
  17. 17.64 + 68 + 14 + 69 =
  18. 18.42 + 33 + 82 + 23 =
  19. 19.68 + 51 + 52 + 76 =
  20. 20.32 + 52 + 73 + 71 =
  21. 21.81 + 18 + 43 + 51 =
  22. 22.41 + 66 + 42 + 28 =
  23. 23.53 + 48 + 64 + 18 =
  24. 24.40 + 78 + 46 + 46 =
  25. 25.11 + 81 + 40 + 31 =
  26. 26.56 + 57 + 76 + 75 =
  27. 27.68 + 39 + 49 + 14 =
  28. 28.37 + 36 + 12 + 36 =
  29. 29.30 + 53 + 39 + 49 =
  30. 30.32 + 75 + 61 + 65 =
  31. 31.33 + 88 + 21 + 67 =
  32. 32.87 + 59 + 23 + 54 =
  33. 33.58 + 43 + 78 + 64 =
  34. 34.53 + 81 + 40 + 70 =
  35. 35.42 + 58 + 67 + 32 =
  36. 36.21 + 26 + 83 + 69 =
  37. 37.23 + 22 + 86 + 62 =
  38. 38.18 + 70 + 85 + 63 =
  39. 39.53 + 74 + 69 + 20 =
  40. 40.79 + 71 + 38 + 31 =

Answer key

  1. 327
  2. 206
  3. 176
  4. 72
  5. 140
  6. 203
  7. 148
  8. 266
  9. 172
  10. 212
  11. 127
  12. 201
  13. 149
  14. 152
  15. 165
  16. 222
  17. 215
  18. 180
  19. 247
  20. 228
  21. 193
  22. 177
  23. 183
  24. 210
  25. 163
  26. 264
  27. 170
  28. 121
  29. 171
  30. 233
  31. 209
  32. 223
  33. 243
  34. 244
  35. 199
  36. 199
  37. 193
  38. 236
  39. 216
  40. 219

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