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Mental Addition Worksheet

Speed calculation lesson 5: Running totals · Set 279 · 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. 1.66 + 60 + 58 + 24 =
  2. 2.32 + 88 + 21 + 46 =
  3. 3.73 + 53 + 70 + 40 =
  4. 4.26 + 26 + 72 + 82 =
  5. 5.80 + 83 + 41 + 80 =
  6. 6.83 + 25 + 82 + 39 =
  7. 7.29 + 15 + 32 + 72 =
  8. 8.32 + 61 + 48 + 61 =
  9. 9.63 + 67 + 80 + 23 =
  10. 10.36 + 12 + 58 + 19 =
  11. 11.37 + 17 + 87 + 60 =
  12. 12.16 + 65 + 49 + 33 =
  13. 13.22 + 48 + 21 + 51 =
  14. 14.30 + 33 + 87 + 75 =
  15. 15.50 + 87 + 54 + 16 =
  16. 16.51 + 61 + 15 + 22 =
  17. 17.68 + 83 + 24 + 55 =
  18. 18.80 + 25 + 67 + 60 =
  19. 19.64 + 18 + 40 + 17 =
  20. 20.21 + 22 + 13 + 74 =
  21. 21.45 + 72 + 35 + 29 =
  22. 22.22 + 88 + 86 + 37 =
  23. 23.86 + 41 + 63 + 56 =
  24. 24.14 + 87 + 43 + 64 =
  25. 25.49 + 18 + 44 + 16 =
  26. 26.79 + 65 + 32 + 37 =
  27. 27.28 + 68 + 78 + 69 =
  28. 28.64 + 85 + 17 + 37 =
  29. 29.31 + 48 + 18 + 23 =
  30. 30.88 + 64 + 84 + 48 =
  31. 31.34 + 14 + 50 + 56 =
  32. 32.21 + 76 + 64 + 26 =
  33. 33.66 + 58 + 11 + 45 =
  34. 34.77 + 21 + 42 + 37 =
  35. 35.29 + 47 + 75 + 46 =
  36. 36.24 + 81 + 71 + 51 =
  37. 37.25 + 77 + 59 + 33 =
  38. 38.30 + 19 + 59 + 38 =
  39. 39.67 + 48 + 16 + 28 =
  40. 40.88 + 23 + 56 + 22 =

Answer key

  1. 208
  2. 187
  3. 236
  4. 206
  5. 284
  6. 229
  7. 148
  8. 202
  9. 233
  10. 125
  11. 201
  12. 163
  13. 142
  14. 225
  15. 207
  16. 149
  17. 230
  18. 232
  19. 139
  20. 130
  21. 181
  22. 233
  23. 246
  24. 208
  25. 127
  26. 213
  27. 243
  28. 203
  29. 120
  30. 284
  31. 154
  32. 187
  33. 180
  34. 177
  35. 197
  36. 227
  37. 194
  38. 146
  39. 159
  40. 189

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