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Mental Addition Worksheet

Speed calculation lesson 5: Running totals · Set 992 · 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 + 11 + 50 + 19 =
  2. 2.55 + 87 + 84 + 25 =
  3. 3.78 + 78 + 38 + 42 =
  4. 4.51 + 18 + 51 + 15 =
  5. 5.12 + 71 + 18 + 26 =
  6. 6.87 + 49 + 39 + 22 =
  7. 7.49 + 43 + 24 + 63 =
  8. 8.29 + 25 + 58 + 81 =
  9. 9.24 + 14 + 65 + 42 =
  10. 10.47 + 23 + 34 + 42 =
  11. 11.76 + 29 + 43 + 64 =
  12. 12.60 + 50 + 20 + 28 =
  13. 13.86 + 24 + 60 + 17 =
  14. 14.14 + 35 + 19 + 19 =
  15. 15.41 + 55 + 14 + 23 =
  16. 16.74 + 20 + 25 + 78 =
  17. 17.13 + 25 + 43 + 60 =
  18. 18.59 + 67 + 14 + 48 =
  19. 19.88 + 73 + 20 + 89 =
  20. 20.45 + 87 + 18 + 14 =
  21. 21.29 + 71 + 43 + 65 =
  22. 22.30 + 45 + 66 + 33 =
  23. 23.30 + 32 + 79 + 34 =
  24. 24.24 + 71 + 68 + 52 =
  25. 25.34 + 30 + 22 + 43 =
  26. 26.11 + 68 + 44 + 88 =
  27. 27.52 + 24 + 51 + 26 =
  28. 28.31 + 54 + 11 + 51 =
  29. 29.17 + 32 + 78 + 16 =
  30. 30.24 + 33 + 78 + 47 =
  31. 31.25 + 87 + 46 + 30 =
  32. 32.25 + 43 + 88 + 72 =
  33. 33.77 + 83 + 80 + 52 =
  34. 34.46 + 39 + 14 + 66 =
  35. 35.79 + 23 + 20 + 49 =
  36. 36.38 + 54 + 69 + 36 =
  37. 37.50 + 78 + 58 + 72 =
  38. 38.30 + 66 + 53 + 52 =
  39. 39.66 + 79 + 56 + 51 =
  40. 40.52 + 59 + 33 + 72 =

Answer key

  1. 92
  2. 251
  3. 236
  4. 135
  5. 127
  6. 197
  7. 179
  8. 193
  9. 145
  10. 146
  11. 212
  12. 158
  13. 187
  14. 87
  15. 133
  16. 197
  17. 141
  18. 188
  19. 270
  20. 164
  21. 208
  22. 174
  23. 175
  24. 215
  25. 129
  26. 211
  27. 153
  28. 147
  29. 143
  30. 182
  31. 188
  32. 228
  33. 292
  34. 165
  35. 171
  36. 197
  37. 258
  38. 201
  39. 252
  40. 216

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