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Mental Addition Worksheet

Speed calculation lesson 5: Running totals · Set 624 · 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. 1.62 + 26 + 29 + 55 =
  2. 2.70 + 35 + 55 + 27 =
  3. 3.68 + 28 + 34 + 22 =
  4. 4.12 + 64 + 78 + 51 =
  5. 5.52 + 19 + 74 + 14 =
  6. 6.60 + 85 + 52 + 18 =
  7. 7.27 + 56 + 61 + 40 =
  8. 8.31 + 77 + 14 + 19 =
  9. 9.21 + 11 + 31 + 88 =
  10. 10.22 + 57 + 19 + 22 =
  11. 11.73 + 73 + 78 + 12 =
  12. 12.44 + 74 + 50 + 89 =
  13. 13.86 + 36 + 56 + 57 =
  14. 14.29 + 13 + 73 + 44 =
  15. 15.80 + 47 + 64 + 60 =
  16. 16.15 + 73 + 81 + 12 =
  17. 17.84 + 27 + 86 + 52 =
  18. 18.27 + 25 + 43 + 12 =
  19. 19.48 + 84 + 46 + 88 =
  20. 20.52 + 61 + 85 + 28 =
  21. 21.32 + 13 + 57 + 70 =
  22. 22.14 + 40 + 80 + 58 =
  23. 23.87 + 85 + 14 + 33 =
  24. 24.87 + 60 + 34 + 51 =
  25. 25.82 + 15 + 72 + 72 =
  26. 26.24 + 11 + 48 + 43 =
  27. 27.27 + 39 + 54 + 79 =
  28. 28.29 + 63 + 79 + 58 =
  29. 29.33 + 24 + 24 + 16 =
  30. 30.74 + 40 + 78 + 24 =
  31. 31.15 + 19 + 46 + 43 =
  32. 32.28 + 46 + 59 + 42 =
  33. 33.51 + 12 + 30 + 59 =
  34. 34.71 + 42 + 84 + 62 =
  35. 35.40 + 31 + 38 + 19 =
  36. 36.18 + 26 + 64 + 31 =
  37. 37.70 + 13 + 88 + 29 =
  38. 38.74 + 20 + 62 + 52 =
  39. 39.25 + 74 + 18 + 28 =
  40. 40.12 + 58 + 21 + 21 =

Answer key

  1. 172
  2. 187
  3. 152
  4. 205
  5. 159
  6. 215
  7. 184
  8. 141
  9. 151
  10. 120
  11. 236
  12. 257
  13. 235
  14. 159
  15. 251
  16. 181
  17. 249
  18. 107
  19. 266
  20. 226
  21. 172
  22. 192
  23. 219
  24. 232
  25. 241
  26. 126
  27. 199
  28. 229
  29. 97
  30. 216
  31. 123
  32. 175
  33. 152
  34. 259
  35. 128
  36. 139
  37. 200
  38. 208
  39. 145
  40. 112

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