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Mental Addition Worksheet

Speed calculation lesson 5: Running totals · Set 379 · 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. 1.12 + 62 + 27 + 35 =
  2. 2.66 + 29 + 42 + 66 =
  3. 3.86 + 27 + 22 + 33 =
  4. 4.85 + 74 + 27 + 56 =
  5. 5.89 + 18 + 41 + 43 =
  6. 6.71 + 41 + 33 + 79 =
  7. 7.34 + 88 + 86 + 81 =
  8. 8.19 + 15 + 69 + 22 =
  9. 9.33 + 26 + 76 + 24 =
  10. 10.15 + 11 + 58 + 54 =
  11. 11.30 + 16 + 50 + 16 =
  12. 12.56 + 15 + 31 + 71 =
  13. 13.28 + 14 + 18 + 30 =
  14. 14.15 + 82 + 59 + 54 =
  15. 15.23 + 41 + 34 + 43 =
  16. 16.59 + 75 + 34 + 83 =
  17. 17.33 + 25 + 77 + 33 =
  18. 18.52 + 79 + 20 + 50 =
  19. 19.16 + 82 + 45 + 38 =
  20. 20.28 + 67 + 45 + 69 =
  21. 21.12 + 19 + 54 + 16 =
  22. 22.40 + 80 + 62 + 76 =
  23. 23.63 + 62 + 40 + 63 =
  24. 24.27 + 45 + 32 + 60 =
  25. 25.62 + 58 + 49 + 77 =
  26. 26.34 + 67 + 78 + 33 =
  27. 27.85 + 51 + 53 + 64 =
  28. 28.41 + 18 + 22 + 25 =
  29. 29.23 + 73 + 28 + 55 =
  30. 30.22 + 19 + 16 + 41 =
  31. 31.16 + 16 + 60 + 39 =
  32. 32.32 + 39 + 12 + 12 =
  33. 33.65 + 60 + 78 + 38 =
  34. 34.67 + 77 + 45 + 57 =
  35. 35.63 + 60 + 31 + 58 =
  36. 36.59 + 14 + 35 + 51 =
  37. 37.40 + 72 + 36 + 58 =
  38. 38.16 + 62 + 51 + 82 =
  39. 39.26 + 73 + 32 + 67 =
  40. 40.38 + 72 + 48 + 58 =

Answer key

  1. 136
  2. 203
  3. 168
  4. 242
  5. 191
  6. 224
  7. 289
  8. 125
  9. 159
  10. 138
  11. 112
  12. 173
  13. 90
  14. 210
  15. 141
  16. 251
  17. 168
  18. 201
  19. 181
  20. 209
  21. 101
  22. 258
  23. 228
  24. 164
  25. 246
  26. 212
  27. 253
  28. 106
  29. 179
  30. 98
  31. 131
  32. 95
  33. 241
  34. 246
  35. 212
  36. 159
  37. 206
  38. 211
  39. 198
  40. 216

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