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Mental Addition Worksheet

Speed calculation lesson 5: Running totals · Set 434 · 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. 1.49 + 78 + 70 + 34 =
  2. 2.55 + 38 + 67 + 29 =
  3. 3.48 + 30 + 61 + 39 =
  4. 4.35 + 60 + 83 + 84 =
  5. 5.53 + 61 + 63 + 64 =
  6. 6.30 + 51 + 78 + 28 =
  7. 7.86 + 16 + 39 + 42 =
  8. 8.79 + 12 + 75 + 21 =
  9. 9.56 + 71 + 89 + 36 =
  10. 10.53 + 76 + 39 + 82 =
  11. 11.17 + 51 + 16 + 46 =
  12. 12.67 + 32 + 44 + 54 =
  13. 13.62 + 21 + 53 + 64 =
  14. 14.53 + 41 + 77 + 67 =
  15. 15.58 + 54 + 40 + 71 =
  16. 16.36 + 39 + 53 + 74 =
  17. 17.53 + 32 + 15 + 76 =
  18. 18.72 + 25 + 72 + 64 =
  19. 19.74 + 70 + 14 + 38 =
  20. 20.57 + 73 + 34 + 22 =
  21. 21.27 + 45 + 31 + 31 =
  22. 22.19 + 71 + 54 + 60 =
  23. 23.79 + 19 + 48 + 52 =
  24. 24.37 + 89 + 32 + 23 =
  25. 25.52 + 40 + 68 + 23 =
  26. 26.36 + 24 + 39 + 61 =
  27. 27.80 + 31 + 85 + 47 =
  28. 28.53 + 27 + 69 + 25 =
  29. 29.85 + 29 + 88 + 75 =
  30. 30.29 + 30 + 19 + 81 =
  31. 31.43 + 43 + 83 + 82 =
  32. 32.16 + 70 + 17 + 17 =
  33. 33.19 + 67 + 52 + 26 =
  34. 34.77 + 11 + 27 + 85 =
  35. 35.60 + 66 + 23 + 86 =
  36. 36.27 + 77 + 46 + 85 =
  37. 37.11 + 89 + 55 + 33 =
  38. 38.24 + 26 + 14 + 44 =
  39. 39.75 + 74 + 76 + 82 =
  40. 40.64 + 49 + 18 + 29 =

Answer key

  1. 231
  2. 189
  3. 178
  4. 262
  5. 241
  6. 187
  7. 183
  8. 187
  9. 252
  10. 250
  11. 130
  12. 197
  13. 200
  14. 238
  15. 223
  16. 202
  17. 176
  18. 233
  19. 196
  20. 186
  21. 134
  22. 204
  23. 198
  24. 181
  25. 183
  26. 160
  27. 243
  28. 174
  29. 277
  30. 159
  31. 251
  32. 120
  33. 164
  34. 200
  35. 235
  36. 235
  37. 188
  38. 108
  39. 307
  40. 160

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