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Mental Addition Worksheet

Speed calculation lesson 5: Running totals · Set 943 · 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. 1.30 + 84 + 17 + 49 =
  2. 2.26 + 65 + 62 + 22 =
  3. 3.29 + 74 + 16 + 67 =
  4. 4.84 + 42 + 13 + 28 =
  5. 5.66 + 14 + 29 + 88 =
  6. 6.34 + 33 + 63 + 14 =
  7. 7.57 + 85 + 68 + 25 =
  8. 8.30 + 24 + 46 + 80 =
  9. 9.20 + 32 + 40 + 17 =
  10. 10.68 + 33 + 49 + 38 =
  11. 11.60 + 23 + 24 + 31 =
  12. 12.11 + 56 + 51 + 21 =
  13. 13.42 + 23 + 28 + 79 =
  14. 14.46 + 54 + 22 + 62 =
  15. 15.42 + 52 + 48 + 19 =
  16. 16.60 + 82 + 48 + 20 =
  17. 17.86 + 72 + 61 + 36 =
  18. 18.46 + 64 + 67 + 34 =
  19. 19.49 + 46 + 15 + 14 =
  20. 20.14 + 60 + 75 + 33 =
  21. 21.33 + 19 + 82 + 37 =
  22. 22.24 + 16 + 57 + 24 =
  23. 23.68 + 53 + 44 + 49 =
  24. 24.65 + 87 + 67 + 20 =
  25. 25.57 + 33 + 42 + 58 =
  26. 26.79 + 31 + 78 + 76 =
  27. 27.28 + 47 + 29 + 23 =
  28. 28.51 + 78 + 18 + 80 =
  29. 29.87 + 16 + 53 + 14 =
  30. 30.49 + 32 + 73 + 49 =
  31. 31.70 + 81 + 46 + 85 =
  32. 32.44 + 87 + 70 + 50 =
  33. 33.49 + 19 + 71 + 69 =
  34. 34.20 + 25 + 85 + 74 =
  35. 35.80 + 65 + 30 + 23 =
  36. 36.64 + 19 + 86 + 38 =
  37. 37.25 + 84 + 21 + 45 =
  38. 38.64 + 25 + 23 + 86 =
  39. 39.29 + 51 + 25 + 69 =
  40. 40.56 + 42 + 60 + 48 =

Answer key

  1. 180
  2. 175
  3. 186
  4. 167
  5. 197
  6. 144
  7. 235
  8. 180
  9. 109
  10. 188
  11. 138
  12. 139
  13. 172
  14. 184
  15. 161
  16. 210
  17. 255
  18. 211
  19. 124
  20. 182
  21. 171
  22. 121
  23. 214
  24. 239
  25. 190
  26. 264
  27. 127
  28. 227
  29. 170
  30. 203
  31. 282
  32. 251
  33. 208
  34. 204
  35. 198
  36. 207
  37. 175
  38. 198
  39. 174
  40. 206

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