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Mental Addition Worksheet

Speed calculation lesson 5: Running totals · Set 877 · 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. 1.76 + 66 + 16 + 52 =
  2. 2.72 + 49 + 41 + 89 =
  3. 3.29 + 33 + 74 + 35 =
  4. 4.28 + 42 + 69 + 23 =
  5. 5.59 + 61 + 64 + 45 =
  6. 6.65 + 24 + 42 + 76 =
  7. 7.60 + 82 + 21 + 63 =
  8. 8.41 + 59 + 84 + 53 =
  9. 9.25 + 16 + 62 + 71 =
  10. 10.27 + 87 + 32 + 16 =
  11. 11.56 + 67 + 66 + 22 =
  12. 12.23 + 21 + 29 + 13 =
  13. 13.45 + 62 + 12 + 77 =
  14. 14.28 + 48 + 59 + 60 =
  15. 15.48 + 72 + 66 + 20 =
  16. 16.55 + 14 + 78 + 76 =
  17. 17.12 + 70 + 33 + 70 =
  18. 18.65 + 34 + 59 + 74 =
  19. 19.54 + 33 + 29 + 23 =
  20. 20.56 + 27 + 58 + 25 =
  21. 21.15 + 48 + 13 + 19 =
  22. 22.66 + 63 + 41 + 22 =
  23. 23.34 + 16 + 73 + 14 =
  24. 24.62 + 37 + 47 + 51 =
  25. 25.51 + 13 + 17 + 12 =
  26. 26.24 + 60 + 81 + 15 =
  27. 27.20 + 43 + 20 + 82 =
  28. 28.63 + 29 + 80 + 52 =
  29. 29.86 + 85 + 81 + 63 =
  30. 30.33 + 23 + 59 + 37 =
  31. 31.60 + 70 + 28 + 72 =
  32. 32.53 + 42 + 78 + 52 =
  33. 33.21 + 33 + 78 + 82 =
  34. 34.51 + 78 + 73 + 62 =
  35. 35.25 + 52 + 28 + 88 =
  36. 36.18 + 69 + 15 + 28 =
  37. 37.43 + 30 + 60 + 25 =
  38. 38.70 + 85 + 81 + 65 =
  39. 39.58 + 26 + 11 + 85 =
  40. 40.43 + 31 + 32 + 26 =

Answer key

  1. 210
  2. 251
  3. 171
  4. 162
  5. 229
  6. 207
  7. 226
  8. 237
  9. 174
  10. 162
  11. 211
  12. 86
  13. 196
  14. 195
  15. 206
  16. 223
  17. 185
  18. 232
  19. 139
  20. 166
  21. 95
  22. 192
  23. 137
  24. 197
  25. 93
  26. 180
  27. 165
  28. 224
  29. 315
  30. 152
  31. 230
  32. 225
  33. 214
  34. 264
  35. 193
  36. 130
  37. 158
  38. 301
  39. 180
  40. 132

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