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Mental Addition Worksheet

Speed calculation lesson 5: Running totals · Set 565 · 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. 1.36 + 53 + 65 + 16 =
  2. 2.63 + 88 + 57 + 28 =
  3. 3.34 + 67 + 17 + 69 =
  4. 4.18 + 84 + 66 + 22 =
  5. 5.61 + 13 + 85 + 29 =
  6. 6.89 + 43 + 46 + 75 =
  7. 7.66 + 83 + 23 + 65 =
  8. 8.53 + 54 + 60 + 35 =
  9. 9.64 + 45 + 33 + 28 =
  10. 10.31 + 60 + 53 + 48 =
  11. 11.33 + 77 + 23 + 59 =
  12. 12.39 + 13 + 58 + 65 =
  13. 13.55 + 79 + 47 + 13 =
  14. 14.80 + 38 + 51 + 58 =
  15. 15.66 + 86 + 47 + 31 =
  16. 16.62 + 34 + 43 + 49 =
  17. 17.32 + 88 + 40 + 46 =
  18. 18.13 + 45 + 24 + 34 =
  19. 19.79 + 72 + 85 + 27 =
  20. 20.66 + 65 + 57 + 66 =
  21. 21.32 + 82 + 17 + 80 =
  22. 22.30 + 82 + 77 + 75 =
  23. 23.85 + 33 + 37 + 18 =
  24. 24.25 + 13 + 51 + 64 =
  25. 25.86 + 31 + 23 + 34 =
  26. 26.31 + 17 + 30 + 45 =
  27. 27.50 + 56 + 55 + 50 =
  28. 28.78 + 69 + 53 + 66 =
  29. 29.38 + 46 + 28 + 39 =
  30. 30.60 + 59 + 76 + 26 =
  31. 31.89 + 13 + 76 + 44 =
  32. 32.71 + 18 + 26 + 33 =
  33. 33.52 + 28 + 47 + 39 =
  34. 34.64 + 20 + 31 + 17 =
  35. 35.76 + 39 + 71 + 48 =
  36. 36.61 + 28 + 31 + 19 =
  37. 37.67 + 24 + 39 + 19 =
  38. 38.15 + 37 + 21 + 79 =
  39. 39.74 + 48 + 58 + 14 =
  40. 40.72 + 80 + 20 + 54 =

Answer key

  1. 170
  2. 236
  3. 187
  4. 190
  5. 188
  6. 253
  7. 237
  8. 202
  9. 170
  10. 192
  11. 192
  12. 175
  13. 194
  14. 227
  15. 230
  16. 188
  17. 206
  18. 116
  19. 263
  20. 254
  21. 211
  22. 264
  23. 173
  24. 153
  25. 174
  26. 123
  27. 211
  28. 266
  29. 151
  30. 221
  31. 222
  32. 148
  33. 166
  34. 132
  35. 234
  36. 139
  37. 149
  38. 152
  39. 194
  40. 226

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