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Mental Addition Worksheet

Speed calculation lesson 5: Running totals · Set 433 · 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. 1.50 + 31 + 87 + 79 =
  2. 2.20 + 78 + 16 + 24 =
  3. 3.37 + 86 + 60 + 18 =
  4. 4.88 + 29 + 25 + 26 =
  5. 5.30 + 87 + 30 + 38 =
  6. 6.21 + 56 + 87 + 15 =
  7. 7.77 + 41 + 62 + 26 =
  8. 8.70 + 29 + 52 + 30 =
  9. 9.64 + 61 + 19 + 73 =
  10. 10.62 + 67 + 11 + 46 =
  11. 11.52 + 24 + 87 + 56 =
  12. 12.60 + 60 + 18 + 58 =
  13. 13.29 + 61 + 35 + 29 =
  14. 14.40 + 80 + 45 + 57 =
  15. 15.46 + 17 + 78 + 75 =
  16. 16.36 + 17 + 21 + 77 =
  17. 17.71 + 55 + 35 + 72 =
  18. 18.68 + 46 + 33 + 15 =
  19. 19.22 + 46 + 15 + 22 =
  20. 20.62 + 11 + 25 + 46 =
  21. 21.60 + 50 + 11 + 21 =
  22. 22.44 + 27 + 79 + 43 =
  23. 23.50 + 74 + 19 + 47 =
  24. 24.17 + 42 + 24 + 69 =
  25. 25.76 + 45 + 38 + 25 =
  26. 26.23 + 28 + 81 + 72 =
  27. 27.51 + 57 + 66 + 35 =
  28. 28.82 + 63 + 31 + 57 =
  29. 29.38 + 16 + 48 + 16 =
  30. 30.78 + 40 + 14 + 46 =
  31. 31.82 + 62 + 17 + 57 =
  32. 32.20 + 28 + 43 + 71 =
  33. 33.33 + 26 + 21 + 75 =
  34. 34.74 + 79 + 46 + 33 =
  35. 35.17 + 21 + 53 + 46 =
  36. 36.27 + 11 + 15 + 60 =
  37. 37.23 + 73 + 54 + 50 =
  38. 38.76 + 23 + 39 + 68 =
  39. 39.12 + 69 + 25 + 88 =
  40. 40.68 + 35 + 82 + 39 =

Answer key

  1. 247
  2. 138
  3. 201
  4. 168
  5. 185
  6. 179
  7. 206
  8. 181
  9. 217
  10. 186
  11. 219
  12. 196
  13. 154
  14. 222
  15. 216
  16. 151
  17. 233
  18. 162
  19. 105
  20. 144
  21. 142
  22. 193
  23. 190
  24. 152
  25. 184
  26. 204
  27. 209
  28. 233
  29. 118
  30. 178
  31. 218
  32. 162
  33. 155
  34. 232
  35. 137
  36. 113
  37. 200
  38. 206
  39. 194
  40. 224

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