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Mental Addition Worksheet

Speed calculation lesson 5: Running totals · Set 160 · 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. 1.88 + 31 + 11 + 36 =
  2. 2.49 + 11 + 58 + 33 =
  3. 3.71 + 82 + 20 + 24 =
  4. 4.66 + 39 + 37 + 16 =
  5. 5.44 + 75 + 87 + 74 =
  6. 6.46 + 29 + 74 + 38 =
  7. 7.72 + 61 + 13 + 21 =
  8. 8.21 + 30 + 16 + 86 =
  9. 9.60 + 63 + 59 + 61 =
  10. 10.32 + 77 + 42 + 70 =
  11. 11.48 + 88 + 42 + 36 =
  12. 12.20 + 56 + 74 + 74 =
  13. 13.43 + 34 + 75 + 65 =
  14. 14.82 + 45 + 11 + 19 =
  15. 15.58 + 64 + 58 + 36 =
  16. 16.69 + 19 + 65 + 21 =
  17. 17.28 + 66 + 87 + 31 =
  18. 18.34 + 33 + 44 + 88 =
  19. 19.53 + 40 + 12 + 17 =
  20. 20.62 + 44 + 18 + 27 =
  21. 21.11 + 70 + 23 + 28 =
  22. 22.76 + 71 + 21 + 64 =
  23. 23.38 + 53 + 18 + 24 =
  24. 24.59 + 35 + 27 + 63 =
  25. 25.83 + 75 + 89 + 41 =
  26. 26.21 + 79 + 58 + 71 =
  27. 27.81 + 47 + 11 + 73 =
  28. 28.80 + 48 + 79 + 74 =
  29. 29.29 + 70 + 37 + 11 =
  30. 30.50 + 74 + 20 + 60 =
  31. 31.41 + 87 + 87 + 18 =
  32. 32.12 + 29 + 14 + 55 =
  33. 33.46 + 64 + 62 + 14 =
  34. 34.84 + 50 + 20 + 28 =
  35. 35.47 + 63 + 86 + 17 =
  36. 36.35 + 58 + 12 + 48 =
  37. 37.75 + 79 + 88 + 71 =
  38. 38.57 + 77 + 39 + 47 =
  39. 39.62 + 67 + 52 + 43 =
  40. 40.44 + 48 + 48 + 81 =

Answer key

  1. 166
  2. 151
  3. 197
  4. 158
  5. 280
  6. 187
  7. 167
  8. 153
  9. 243
  10. 221
  11. 214
  12. 224
  13. 217
  14. 157
  15. 216
  16. 174
  17. 212
  18. 199
  19. 122
  20. 151
  21. 132
  22. 232
  23. 133
  24. 184
  25. 288
  26. 229
  27. 212
  28. 281
  29. 147
  30. 204
  31. 233
  32. 110
  33. 186
  34. 182
  35. 213
  36. 153
  37. 313
  38. 220
  39. 224
  40. 221

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