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Mental Addition Worksheet

Speed calculation lesson 5: Running totals · Set 87 · 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. 1.22 + 52 + 12 + 75 =
  2. 2.80 + 24 + 22 + 18 =
  3. 3.27 + 69 + 17 + 23 =
  4. 4.14 + 59 + 56 + 69 =
  5. 5.32 + 42 + 48 + 73 =
  6. 6.40 + 54 + 23 + 11 =
  7. 7.87 + 52 + 58 + 67 =
  8. 8.33 + 16 + 14 + 59 =
  9. 9.81 + 66 + 61 + 55 =
  10. 10.60 + 28 + 78 + 70 =
  11. 11.43 + 70 + 32 + 60 =
  12. 12.54 + 62 + 12 + 80 =
  13. 13.85 + 86 + 37 + 48 =
  14. 14.50 + 14 + 19 + 77 =
  15. 15.65 + 32 + 85 + 69 =
  16. 16.20 + 75 + 88 + 29 =
  17. 17.68 + 30 + 32 + 72 =
  18. 18.63 + 34 + 69 + 58 =
  19. 19.87 + 74 + 18 + 87 =
  20. 20.21 + 24 + 23 + 54 =
  21. 21.61 + 82 + 42 + 60 =
  22. 22.63 + 51 + 80 + 29 =
  23. 23.12 + 65 + 55 + 85 =
  24. 24.44 + 62 + 36 + 53 =
  25. 25.39 + 35 + 17 + 34 =
  26. 26.70 + 18 + 16 + 67 =
  27. 27.83 + 30 + 12 + 43 =
  28. 28.82 + 20 + 38 + 33 =
  29. 29.43 + 52 + 37 + 33 =
  30. 30.68 + 38 + 14 + 39 =
  31. 31.40 + 41 + 35 + 48 =
  32. 32.28 + 56 + 57 + 17 =
  33. 33.60 + 30 + 54 + 43 =
  34. 34.74 + 25 + 23 + 15 =
  35. 35.89 + 46 + 45 + 77 =
  36. 36.63 + 88 + 43 + 36 =
  37. 37.61 + 35 + 59 + 25 =
  38. 38.30 + 53 + 62 + 41 =
  39. 39.60 + 41 + 64 + 25 =
  40. 40.33 + 51 + 51 + 37 =

Answer key

  1. 161
  2. 144
  3. 136
  4. 198
  5. 195
  6. 128
  7. 264
  8. 122
  9. 263
  10. 236
  11. 205
  12. 208
  13. 256
  14. 160
  15. 251
  16. 212
  17. 202
  18. 224
  19. 266
  20. 122
  21. 245
  22. 223
  23. 217
  24. 195
  25. 125
  26. 171
  27. 168
  28. 173
  29. 165
  30. 159
  31. 164
  32. 158
  33. 187
  34. 137
  35. 257
  36. 230
  37. 180
  38. 186
  39. 190
  40. 172

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