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Mental Addition Worksheet

Speed calculation lesson 5: Running totals · Set 415 · 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. 1.48 + 36 + 29 + 32 =
  2. 2.41 + 56 + 47 + 55 =
  3. 3.24 + 44 + 43 + 77 =
  4. 4.71 + 52 + 86 + 86 =
  5. 5.36 + 38 + 51 + 62 =
  6. 6.35 + 79 + 68 + 34 =
  7. 7.32 + 45 + 63 + 87 =
  8. 8.14 + 76 + 63 + 78 =
  9. 9.34 + 31 + 56 + 69 =
  10. 10.54 + 15 + 23 + 31 =
  11. 11.63 + 16 + 21 + 51 =
  12. 12.60 + 31 + 32 + 71 =
  13. 13.45 + 70 + 28 + 59 =
  14. 14.21 + 62 + 20 + 74 =
  15. 15.59 + 12 + 46 + 63 =
  16. 16.84 + 86 + 30 + 68 =
  17. 17.46 + 57 + 44 + 15 =
  18. 18.30 + 19 + 12 + 72 =
  19. 19.27 + 37 + 49 + 15 =
  20. 20.72 + 19 + 51 + 14 =
  21. 21.17 + 21 + 67 + 54 =
  22. 22.82 + 58 + 24 + 58 =
  23. 23.16 + 44 + 79 + 34 =
  24. 24.35 + 61 + 89 + 16 =
  25. 25.15 + 22 + 80 + 57 =
  26. 26.30 + 60 + 50 + 51 =
  27. 27.27 + 24 + 55 + 21 =
  28. 28.55 + 12 + 69 + 54 =
  29. 29.50 + 67 + 79 + 84 =
  30. 30.89 + 63 + 32 + 13 =
  31. 31.24 + 53 + 32 + 61 =
  32. 32.46 + 65 + 31 + 59 =
  33. 33.40 + 41 + 76 + 50 =
  34. 34.27 + 13 + 44 + 83 =
  35. 35.62 + 23 + 46 + 20 =
  36. 36.71 + 20 + 83 + 43 =
  37. 37.46 + 87 + 46 + 27 =
  38. 38.69 + 69 + 68 + 85 =
  39. 39.15 + 65 + 73 + 71 =
  40. 40.45 + 39 + 45 + 42 =

Answer key

  1. 145
  2. 199
  3. 188
  4. 295
  5. 187
  6. 216
  7. 227
  8. 231
  9. 190
  10. 123
  11. 151
  12. 194
  13. 202
  14. 177
  15. 180
  16. 268
  17. 162
  18. 133
  19. 128
  20. 156
  21. 159
  22. 222
  23. 173
  24. 201
  25. 174
  26. 191
  27. 127
  28. 190
  29. 280
  30. 197
  31. 170
  32. 201
  33. 207
  34. 167
  35. 151
  36. 217
  37. 206
  38. 291
  39. 224
  40. 171

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