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Mental Addition Worksheet

Speed calculation lesson 5: Running totals · Set 100 · 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. 1.41 + 70 + 61 + 37 =
  2. 2.88 + 71 + 67 + 25 =
  3. 3.74 + 30 + 88 + 26 =
  4. 4.17 + 31 + 29 + 64 =
  5. 5.29 + 60 + 40 + 78 =
  6. 6.45 + 65 + 39 + 74 =
  7. 7.44 + 12 + 39 + 32 =
  8. 8.27 + 68 + 31 + 49 =
  9. 9.47 + 67 + 67 + 25 =
  10. 10.25 + 31 + 43 + 57 =
  11. 11.37 + 82 + 22 + 61 =
  12. 12.76 + 78 + 78 + 50 =
  13. 13.48 + 30 + 33 + 58 =
  14. 14.21 + 32 + 81 + 11 =
  15. 15.24 + 51 + 29 + 62 =
  16. 16.23 + 52 + 46 + 73 =
  17. 17.22 + 76 + 48 + 25 =
  18. 18.52 + 27 + 52 + 50 =
  19. 19.28 + 17 + 15 + 37 =
  20. 20.61 + 66 + 31 + 89 =
  21. 21.67 + 47 + 47 + 19 =
  22. 22.50 + 13 + 65 + 34 =
  23. 23.47 + 62 + 37 + 31 =
  24. 24.44 + 26 + 51 + 20 =
  25. 25.36 + 77 + 74 + 60 =
  26. 26.67 + 61 + 35 + 59 =
  27. 27.58 + 69 + 44 + 70 =
  28. 28.77 + 52 + 58 + 57 =
  29. 29.12 + 27 + 80 + 42 =
  30. 30.45 + 65 + 59 + 57 =
  31. 31.14 + 44 + 25 + 53 =
  32. 32.88 + 82 + 47 + 89 =
  33. 33.31 + 50 + 31 + 77 =
  34. 34.37 + 14 + 59 + 11 =
  35. 35.68 + 17 + 12 + 72 =
  36. 36.15 + 23 + 16 + 41 =
  37. 37.58 + 57 + 33 + 43 =
  38. 38.62 + 32 + 61 + 49 =
  39. 39.81 + 77 + 86 + 53 =
  40. 40.62 + 15 + 27 + 56 =

Answer key

  1. 209
  2. 251
  3. 218
  4. 141
  5. 207
  6. 223
  7. 127
  8. 175
  9. 206
  10. 156
  11. 202
  12. 282
  13. 169
  14. 145
  15. 166
  16. 194
  17. 171
  18. 181
  19. 97
  20. 247
  21. 180
  22. 162
  23. 177
  24. 141
  25. 247
  26. 222
  27. 241
  28. 244
  29. 161
  30. 226
  31. 136
  32. 306
  33. 189
  34. 121
  35. 169
  36. 95
  37. 191
  38. 204
  39. 297
  40. 160

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