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Mental Addition Worksheet

Speed calculation lesson 5: Running totals · Set 79 · 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. 1.37 + 14 + 55 + 60 =
  2. 2.29 + 79 + 49 + 52 =
  3. 3.20 + 78 + 56 + 57 =
  4. 4.30 + 19 + 39 + 57 =
  5. 5.16 + 15 + 28 + 44 =
  6. 6.54 + 63 + 29 + 35 =
  7. 7.46 + 67 + 35 + 48 =
  8. 8.46 + 63 + 81 + 50 =
  9. 9.16 + 60 + 23 + 12 =
  10. 10.49 + 52 + 52 + 12 =
  11. 11.35 + 27 + 57 + 18 =
  12. 12.35 + 77 + 22 + 64 =
  13. 13.61 + 43 + 87 + 27 =
  14. 14.12 + 27 + 65 + 88 =
  15. 15.24 + 19 + 39 + 19 =
  16. 16.30 + 15 + 14 + 16 =
  17. 17.29 + 35 + 18 + 77 =
  18. 18.34 + 29 + 31 + 37 =
  19. 19.76 + 74 + 86 + 18 =
  20. 20.53 + 51 + 16 + 65 =
  21. 21.77 + 13 + 13 + 56 =
  22. 22.23 + 13 + 75 + 76 =
  23. 23.54 + 11 + 39 + 72 =
  24. 24.57 + 69 + 55 + 78 =
  25. 25.46 + 57 + 29 + 49 =
  26. 26.33 + 59 + 47 + 52 =
  27. 27.27 + 74 + 74 + 23 =
  28. 28.37 + 13 + 73 + 30 =
  29. 29.18 + 28 + 17 + 82 =
  30. 30.87 + 19 + 55 + 73 =
  31. 31.80 + 16 + 33 + 34 =
  32. 32.19 + 82 + 46 + 87 =
  33. 33.51 + 44 + 69 + 75 =
  34. 34.21 + 25 + 75 + 79 =
  35. 35.79 + 45 + 74 + 75 =
  36. 36.27 + 61 + 37 + 68 =
  37. 37.45 + 88 + 34 + 81 =
  38. 38.21 + 25 + 30 + 73 =
  39. 39.18 + 18 + 65 + 52 =
  40. 40.15 + 80 + 27 + 77 =

Answer key

  1. 166
  2. 209
  3. 211
  4. 145
  5. 103
  6. 181
  7. 196
  8. 240
  9. 111
  10. 165
  11. 137
  12. 198
  13. 218
  14. 192
  15. 101
  16. 75
  17. 159
  18. 131
  19. 254
  20. 185
  21. 159
  22. 187
  23. 176
  24. 259
  25. 181
  26. 191
  27. 198
  28. 153
  29. 145
  30. 234
  31. 163
  32. 234
  33. 239
  34. 200
  35. 273
  36. 193
  37. 248
  38. 149
  39. 153
  40. 199

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