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Mental Addition Worksheet

Speed calculation lesson 5: Running totals · Set 738 · 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. 1.69 + 13 + 21 + 89 =
  2. 2.79 + 72 + 47 + 83 =
  3. 3.72 + 32 + 77 + 57 =
  4. 4.27 + 63 + 42 + 78 =
  5. 5.18 + 82 + 78 + 57 =
  6. 6.48 + 23 + 73 + 45 =
  7. 7.63 + 43 + 45 + 50 =
  8. 8.59 + 54 + 78 + 75 =
  9. 9.60 + 64 + 73 + 69 =
  10. 10.31 + 68 + 65 + 36 =
  11. 11.48 + 49 + 34 + 40 =
  12. 12.17 + 53 + 52 + 76 =
  13. 13.72 + 16 + 74 + 24 =
  14. 14.31 + 45 + 53 + 83 =
  15. 15.47 + 64 + 65 + 74 =
  16. 16.84 + 11 + 32 + 59 =
  17. 17.38 + 16 + 31 + 50 =
  18. 18.89 + 47 + 40 + 42 =
  19. 19.23 + 53 + 24 + 33 =
  20. 20.75 + 51 + 24 + 79 =
  21. 21.30 + 46 + 40 + 82 =
  22. 22.35 + 33 + 49 + 60 =
  23. 23.34 + 84 + 67 + 54 =
  24. 24.84 + 87 + 24 + 89 =
  25. 25.51 + 47 + 88 + 32 =
  26. 26.37 + 73 + 63 + 72 =
  27. 27.53 + 59 + 65 + 45 =
  28. 28.14 + 72 + 84 + 22 =
  29. 29.37 + 80 + 73 + 31 =
  30. 30.16 + 74 + 60 + 85 =
  31. 31.47 + 59 + 65 + 57 =
  32. 32.13 + 88 + 87 + 83 =
  33. 33.65 + 35 + 67 + 27 =
  34. 34.19 + 54 + 18 + 26 =
  35. 35.89 + 62 + 36 + 80 =
  36. 36.34 + 20 + 27 + 12 =
  37. 37.75 + 33 + 60 + 36 =
  38. 38.69 + 18 + 30 + 17 =
  39. 39.56 + 34 + 62 + 30 =
  40. 40.70 + 12 + 76 + 18 =

Answer key

  1. 192
  2. 281
  3. 238
  4. 210
  5. 235
  6. 189
  7. 201
  8. 266
  9. 266
  10. 200
  11. 171
  12. 198
  13. 186
  14. 212
  15. 250
  16. 186
  17. 135
  18. 218
  19. 133
  20. 229
  21. 198
  22. 177
  23. 239
  24. 284
  25. 218
  26. 245
  27. 222
  28. 192
  29. 221
  30. 235
  31. 228
  32. 271
  33. 194
  34. 117
  35. 267
  36. 93
  37. 204
  38. 134
  39. 182
  40. 176

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