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Mental Addition Worksheet

Speed calculation lesson 5: Running totals · Set 120 · 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 + 71 + 19 + 17 =
  2. 2.55 + 57 + 42 + 87 =
  3. 3.24 + 63 + 25 + 81 =
  4. 4.13 + 57 + 82 + 64 =
  5. 5.69 + 70 + 84 + 22 =
  6. 6.30 + 74 + 48 + 87 =
  7. 7.45 + 57 + 71 + 26 =
  8. 8.48 + 87 + 17 + 74 =
  9. 9.63 + 66 + 63 + 11 =
  10. 10.64 + 89 + 32 + 48 =
  11. 11.85 + 84 + 84 + 52 =
  12. 12.30 + 80 + 15 + 32 =
  13. 13.55 + 44 + 52 + 31 =
  14. 14.11 + 34 + 56 + 21 =
  15. 15.26 + 23 + 78 + 62 =
  16. 16.47 + 88 + 38 + 18 =
  17. 17.73 + 18 + 50 + 33 =
  18. 18.75 + 81 + 75 + 87 =
  19. 19.25 + 43 + 38 + 32 =
  20. 20.55 + 11 + 23 + 13 =
  21. 21.85 + 47 + 41 + 54 =
  22. 22.45 + 31 + 12 + 44 =
  23. 23.67 + 84 + 78 + 14 =
  24. 24.37 + 62 + 68 + 74 =
  25. 25.13 + 38 + 26 + 38 =
  26. 26.70 + 53 + 35 + 21 =
  27. 27.86 + 63 + 76 + 86 =
  28. 28.16 + 88 + 71 + 31 =
  29. 29.42 + 13 + 35 + 79 =
  30. 30.34 + 49 + 18 + 73 =
  31. 31.75 + 33 + 37 + 79 =
  32. 32.26 + 22 + 89 + 15 =
  33. 33.85 + 23 + 12 + 31 =
  34. 34.81 + 41 + 28 + 14 =
  35. 35.25 + 66 + 22 + 65 =
  36. 36.85 + 28 + 81 + 86 =
  37. 37.60 + 67 + 71 + 84 =
  38. 38.32 + 13 + 68 + 40 =
  39. 39.26 + 64 + 77 + 20 =
  40. 40.47 + 85 + 45 + 86 =

Answer key

  1. 169
  2. 241
  3. 193
  4. 216
  5. 245
  6. 239
  7. 199
  8. 226
  9. 203
  10. 233
  11. 305
  12. 157
  13. 182
  14. 122
  15. 189
  16. 191
  17. 174
  18. 318
  19. 138
  20. 102
  21. 227
  22. 132
  23. 243
  24. 241
  25. 115
  26. 179
  27. 311
  28. 206
  29. 169
  30. 174
  31. 224
  32. 152
  33. 151
  34. 164
  35. 178
  36. 280
  37. 282
  38. 153
  39. 187
  40. 263

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