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Mental Addition Worksheet

Speed calculation lesson 5: Running totals · Set 373 · 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. 1.62 + 42 + 32 + 21 =
  2. 2.79 + 76 + 88 + 81 =
  3. 3.34 + 51 + 73 + 27 =
  4. 4.19 + 30 + 48 + 85 =
  5. 5.24 + 85 + 29 + 38 =
  6. 6.43 + 80 + 18 + 88 =
  7. 7.28 + 28 + 11 + 82 =
  8. 8.22 + 21 + 81 + 11 =
  9. 9.80 + 39 + 65 + 25 =
  10. 10.56 + 25 + 21 + 21 =
  11. 11.40 + 17 + 31 + 27 =
  12. 12.19 + 28 + 17 + 17 =
  13. 13.15 + 60 + 40 + 28 =
  14. 14.21 + 16 + 14 + 17 =
  15. 15.19 + 19 + 33 + 18 =
  16. 16.22 + 24 + 17 + 55 =
  17. 17.38 + 25 + 77 + 83 =
  18. 18.14 + 17 + 22 + 29 =
  19. 19.16 + 46 + 59 + 58 =
  20. 20.65 + 81 + 57 + 12 =
  21. 21.28 + 41 + 25 + 55 =
  22. 22.77 + 21 + 16 + 60 =
  23. 23.70 + 68 + 76 + 49 =
  24. 24.41 + 50 + 60 + 27 =
  25. 25.14 + 15 + 28 + 29 =
  26. 26.32 + 89 + 41 + 40 =
  27. 27.20 + 58 + 19 + 73 =
  28. 28.29 + 62 + 13 + 11 =
  29. 29.29 + 85 + 44 + 77 =
  30. 30.24 + 64 + 41 + 59 =
  31. 31.68 + 26 + 87 + 47 =
  32. 32.20 + 34 + 53 + 39 =
  33. 33.71 + 86 + 23 + 17 =
  34. 34.48 + 26 + 38 + 21 =
  35. 35.88 + 73 + 76 + 44 =
  36. 36.59 + 35 + 24 + 35 =
  37. 37.24 + 32 + 89 + 86 =
  38. 38.83 + 68 + 68 + 34 =
  39. 39.57 + 13 + 45 + 29 =
  40. 40.42 + 53 + 74 + 29 =

Answer key

  1. 157
  2. 324
  3. 185
  4. 182
  5. 176
  6. 229
  7. 149
  8. 135
  9. 209
  10. 123
  11. 115
  12. 81
  13. 143
  14. 68
  15. 89
  16. 118
  17. 223
  18. 82
  19. 179
  20. 215
  21. 149
  22. 174
  23. 263
  24. 178
  25. 86
  26. 202
  27. 170
  28. 115
  29. 235
  30. 188
  31. 228
  32. 146
  33. 197
  34. 133
  35. 281
  36. 153
  37. 231
  38. 253
  39. 144
  40. 198

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