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Mental Addition Worksheet

Speed calculation lesson 5: Running totals · Set 423 · 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. 1.52 + 70 + 36 + 26 =
  2. 2.78 + 57 + 42 + 54 =
  3. 3.45 + 88 + 65 + 54 =
  4. 4.41 + 14 + 73 + 52 =
  5. 5.26 + 16 + 54 + 76 =
  6. 6.42 + 60 + 66 + 62 =
  7. 7.75 + 74 + 66 + 11 =
  8. 8.19 + 31 + 73 + 58 =
  9. 9.57 + 14 + 25 + 19 =
  10. 10.38 + 59 + 11 + 13 =
  11. 11.39 + 14 + 15 + 30 =
  12. 12.48 + 77 + 20 + 21 =
  13. 13.27 + 15 + 46 + 81 =
  14. 14.77 + 57 + 35 + 15 =
  15. 15.18 + 12 + 78 + 67 =
  16. 16.11 + 31 + 88 + 83 =
  17. 17.63 + 38 + 77 + 64 =
  18. 18.29 + 66 + 56 + 87 =
  19. 19.43 + 67 + 89 + 21 =
  20. 20.16 + 61 + 40 + 70 =
  21. 21.18 + 64 + 71 + 72 =
  22. 22.64 + 23 + 39 + 71 =
  23. 23.84 + 58 + 12 + 39 =
  24. 24.84 + 14 + 70 + 20 =
  25. 25.71 + 88 + 36 + 74 =
  26. 26.30 + 34 + 79 + 78 =
  27. 27.66 + 78 + 86 + 33 =
  28. 28.21 + 14 + 23 + 24 =
  29. 29.11 + 67 + 21 + 33 =
  30. 30.26 + 70 + 20 + 27 =
  31. 31.12 + 55 + 18 + 43 =
  32. 32.20 + 33 + 88 + 15 =
  33. 33.49 + 58 + 53 + 47 =
  34. 34.73 + 43 + 80 + 62 =
  35. 35.23 + 61 + 42 + 64 =
  36. 36.19 + 36 + 22 + 88 =
  37. 37.20 + 47 + 11 + 73 =
  38. 38.18 + 82 + 18 + 31 =
  39. 39.19 + 74 + 23 + 85 =
  40. 40.58 + 23 + 40 + 41 =

Answer key

  1. 184
  2. 231
  3. 252
  4. 180
  5. 172
  6. 230
  7. 226
  8. 181
  9. 115
  10. 121
  11. 98
  12. 166
  13. 169
  14. 184
  15. 175
  16. 213
  17. 242
  18. 238
  19. 220
  20. 187
  21. 225
  22. 197
  23. 193
  24. 188
  25. 269
  26. 221
  27. 263
  28. 82
  29. 132
  30. 143
  31. 128
  32. 156
  33. 207
  34. 258
  35. 190
  36. 165
  37. 151
  38. 149
  39. 201
  40. 162

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