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Mental Addition Worksheet

Speed calculation lesson 5: Running totals · Set 603 · 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. 1.52 + 33 + 88 + 34 =
  2. 2.65 + 57 + 59 + 57 =
  3. 3.78 + 52 + 43 + 21 =
  4. 4.31 + 74 + 68 + 78 =
  5. 5.32 + 25 + 61 + 83 =
  6. 6.64 + 17 + 80 + 30 =
  7. 7.51 + 26 + 60 + 71 =
  8. 8.73 + 42 + 33 + 20 =
  9. 9.79 + 27 + 27 + 71 =
  10. 10.11 + 13 + 36 + 48 =
  11. 11.32 + 22 + 69 + 49 =
  12. 12.78 + 35 + 64 + 78 =
  13. 13.51 + 59 + 29 + 29 =
  14. 14.86 + 73 + 74 + 17 =
  15. 15.20 + 58 + 72 + 85 =
  16. 16.77 + 78 + 16 + 39 =
  17. 17.58 + 20 + 56 + 64 =
  18. 18.15 + 34 + 56 + 60 =
  19. 19.57 + 29 + 85 + 28 =
  20. 20.13 + 52 + 45 + 28 =
  21. 21.45 + 17 + 88 + 76 =
  22. 22.34 + 53 + 13 + 45 =
  23. 23.79 + 65 + 21 + 81 =
  24. 24.41 + 24 + 49 + 42 =
  25. 25.14 + 39 + 85 + 70 =
  26. 26.70 + 18 + 44 + 62 =
  27. 27.50 + 44 + 20 + 43 =
  28. 28.62 + 51 + 11 + 41 =
  29. 29.18 + 45 + 33 + 30 =
  30. 30.27 + 25 + 32 + 11 =
  31. 31.56 + 50 + 77 + 14 =
  32. 32.48 + 29 + 41 + 17 =
  33. 33.51 + 67 + 37 + 32 =
  34. 34.71 + 86 + 75 + 72 =
  35. 35.29 + 11 + 65 + 65 =
  36. 36.19 + 75 + 21 + 71 =
  37. 37.50 + 55 + 48 + 76 =
  38. 38.36 + 63 + 13 + 80 =
  39. 39.69 + 11 + 67 + 32 =
  40. 40.29 + 77 + 39 + 81 =

Answer key

  1. 207
  2. 238
  3. 194
  4. 251
  5. 201
  6. 191
  7. 208
  8. 168
  9. 204
  10. 108
  11. 172
  12. 255
  13. 168
  14. 250
  15. 235
  16. 210
  17. 198
  18. 165
  19. 199
  20. 138
  21. 226
  22. 145
  23. 246
  24. 156
  25. 208
  26. 194
  27. 157
  28. 165
  29. 126
  30. 95
  31. 197
  32. 135
  33. 187
  34. 304
  35. 170
  36. 186
  37. 229
  38. 192
  39. 179
  40. 226

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