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Mental Addition Worksheet

Speed calculation lesson 5: Running totals · Set 748 · 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. 1.47 + 78 + 79 + 12 =
  2. 2.89 + 39 + 16 + 49 =
  3. 3.65 + 68 + 39 + 69 =
  4. 4.60 + 42 + 54 + 16 =
  5. 5.85 + 61 + 86 + 36 =
  6. 6.62 + 24 + 78 + 81 =
  7. 7.22 + 26 + 36 + 32 =
  8. 8.48 + 61 + 42 + 73 =
  9. 9.70 + 19 + 11 + 47 =
  10. 10.41 + 42 + 82 + 49 =
  11. 11.70 + 58 + 50 + 14 =
  12. 12.65 + 61 + 22 + 88 =
  13. 13.73 + 79 + 17 + 15 =
  14. 14.71 + 52 + 12 + 25 =
  15. 15.49 + 49 + 24 + 67 =
  16. 16.53 + 18 + 75 + 74 =
  17. 17.48 + 84 + 64 + 75 =
  18. 18.22 + 14 + 75 + 83 =
  19. 19.36 + 38 + 48 + 34 =
  20. 20.58 + 14 + 61 + 66 =
  21. 21.26 + 60 + 75 + 78 =
  22. 22.79 + 18 + 69 + 35 =
  23. 23.24 + 58 + 46 + 66 =
  24. 24.54 + 61 + 12 + 16 =
  25. 25.79 + 84 + 35 + 48 =
  26. 26.72 + 15 + 45 + 53 =
  27. 27.24 + 37 + 27 + 19 =
  28. 28.31 + 13 + 11 + 45 =
  29. 29.18 + 86 + 60 + 19 =
  30. 30.67 + 75 + 26 + 84 =
  31. 31.26 + 71 + 43 + 22 =
  32. 32.25 + 55 + 55 + 76 =
  33. 33.73 + 45 + 38 + 35 =
  34. 34.12 + 77 + 42 + 79 =
  35. 35.28 + 71 + 23 + 18 =
  36. 36.62 + 77 + 21 + 41 =
  37. 37.79 + 65 + 80 + 14 =
  38. 38.77 + 27 + 78 + 69 =
  39. 39.27 + 88 + 32 + 74 =
  40. 40.23 + 78 + 20 + 31 =

Answer key

  1. 216
  2. 193
  3. 241
  4. 172
  5. 268
  6. 245
  7. 116
  8. 224
  9. 147
  10. 214
  11. 192
  12. 236
  13. 184
  14. 160
  15. 189
  16. 220
  17. 271
  18. 194
  19. 156
  20. 199
  21. 239
  22. 201
  23. 194
  24. 143
  25. 246
  26. 185
  27. 107
  28. 100
  29. 183
  30. 252
  31. 162
  32. 211
  33. 191
  34. 210
  35. 140
  36. 201
  37. 238
  38. 251
  39. 221
  40. 152

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