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Mental Addition Worksheet

Speed calculation lesson 5: Running totals · Set 405 · 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. 1.64 + 63 + 28 + 33 =
  2. 2.88 + 32 + 52 + 50 =
  3. 3.80 + 66 + 77 + 19 =
  4. 4.25 + 36 + 70 + 46 =
  5. 5.22 + 19 + 27 + 63 =
  6. 6.70 + 55 + 34 + 33 =
  7. 7.57 + 69 + 38 + 78 =
  8. 8.11 + 35 + 50 + 32 =
  9. 9.87 + 80 + 89 + 23 =
  10. 10.75 + 81 + 55 + 28 =
  11. 11.83 + 61 + 23 + 28 =
  12. 12.59 + 65 + 85 + 47 =
  13. 13.31 + 65 + 19 + 85 =
  14. 14.19 + 15 + 14 + 85 =
  15. 15.37 + 49 + 73 + 21 =
  16. 16.14 + 73 + 45 + 61 =
  17. 17.44 + 35 + 40 + 33 =
  18. 18.64 + 64 + 17 + 50 =
  19. 19.51 + 36 + 41 + 56 =
  20. 20.37 + 75 + 66 + 49 =
  21. 21.85 + 72 + 89 + 23 =
  22. 22.54 + 40 + 63 + 69 =
  23. 23.81 + 19 + 63 + 11 =
  24. 24.12 + 31 + 72 + 28 =
  25. 25.19 + 56 + 34 + 21 =
  26. 26.84 + 23 + 82 + 44 =
  27. 27.28 + 60 + 33 + 62 =
  28. 28.25 + 21 + 37 + 20 =
  29. 29.38 + 31 + 14 + 51 =
  30. 30.21 + 66 + 45 + 55 =
  31. 31.82 + 16 + 56 + 26 =
  32. 32.14 + 17 + 12 + 75 =
  33. 33.56 + 14 + 86 + 26 =
  34. 34.65 + 82 + 58 + 61 =
  35. 35.53 + 16 + 37 + 15 =
  36. 36.18 + 20 + 25 + 88 =
  37. 37.72 + 13 + 86 + 19 =
  38. 38.80 + 64 + 25 + 20 =
  39. 39.30 + 52 + 69 + 77 =
  40. 40.79 + 68 + 38 + 80 =

Answer key

  1. 188
  2. 222
  3. 242
  4. 177
  5. 131
  6. 192
  7. 242
  8. 128
  9. 279
  10. 239
  11. 195
  12. 256
  13. 200
  14. 133
  15. 180
  16. 193
  17. 152
  18. 195
  19. 184
  20. 227
  21. 269
  22. 226
  23. 174
  24. 143
  25. 130
  26. 233
  27. 183
  28. 103
  29. 134
  30. 187
  31. 180
  32. 118
  33. 182
  34. 266
  35. 121
  36. 151
  37. 190
  38. 189
  39. 228
  40. 265

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