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Mental Addition Worksheet

Speed calculation lesson 5: Running totals · Set 743 · 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. 1.70 + 79 + 80 + 68 =
  2. 2.84 + 57 + 19 + 44 =
  3. 3.31 + 17 + 81 + 18 =
  4. 4.11 + 15 + 32 + 69 =
  5. 5.75 + 30 + 15 + 85 =
  6. 6.19 + 28 + 29 + 85 =
  7. 7.17 + 80 + 27 + 56 =
  8. 8.15 + 34 + 44 + 85 =
  9. 9.22 + 69 + 41 + 49 =
  10. 10.89 + 21 + 51 + 69 =
  11. 11.20 + 33 + 62 + 50 =
  12. 12.24 + 17 + 49 + 58 =
  13. 13.11 + 23 + 72 + 32 =
  14. 14.36 + 75 + 77 + 56 =
  15. 15.85 + 26 + 66 + 29 =
  16. 16.55 + 11 + 77 + 39 =
  17. 17.45 + 19 + 65 + 50 =
  18. 18.11 + 84 + 60 + 14 =
  19. 19.39 + 15 + 66 + 80 =
  20. 20.11 + 35 + 49 + 25 =
  21. 21.39 + 48 + 68 + 30 =
  22. 22.65 + 34 + 65 + 87 =
  23. 23.17 + 89 + 74 + 65 =
  24. 24.28 + 33 + 60 + 73 =
  25. 25.71 + 16 + 17 + 88 =
  26. 26.48 + 25 + 70 + 34 =
  27. 27.23 + 70 + 12 + 40 =
  28. 28.19 + 24 + 21 + 26 =
  29. 29.65 + 46 + 19 + 22 =
  30. 30.87 + 13 + 27 + 46 =
  31. 31.60 + 44 + 14 + 36 =
  32. 32.20 + 15 + 25 + 15 =
  33. 33.50 + 24 + 74 + 85 =
  34. 34.78 + 66 + 25 + 45 =
  35. 35.37 + 15 + 64 + 13 =
  36. 36.65 + 81 + 37 + 45 =
  37. 37.33 + 41 + 48 + 49 =
  38. 38.33 + 36 + 25 + 23 =
  39. 39.80 + 84 + 49 + 85 =
  40. 40.87 + 66 + 65 + 54 =

Answer key

  1. 297
  2. 204
  3. 147
  4. 127
  5. 205
  6. 161
  7. 180
  8. 178
  9. 181
  10. 230
  11. 165
  12. 148
  13. 138
  14. 244
  15. 206
  16. 182
  17. 179
  18. 169
  19. 200
  20. 120
  21. 185
  22. 251
  23. 245
  24. 194
  25. 192
  26. 177
  27. 145
  28. 90
  29. 152
  30. 173
  31. 154
  32. 75
  33. 233
  34. 214
  35. 129
  36. 228
  37. 171
  38. 117
  39. 298
  40. 272

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