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Mental Addition Worksheet

Speed calculation lesson 5: Running totals · Set 979 · 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. 1.79 + 25 + 62 + 22 =
  2. 2.74 + 22 + 65 + 23 =
  3. 3.33 + 45 + 76 + 88 =
  4. 4.26 + 88 + 80 + 37 =
  5. 5.80 + 25 + 27 + 12 =
  6. 6.27 + 85 + 58 + 77 =
  7. 7.18 + 62 + 43 + 37 =
  8. 8.16 + 74 + 59 + 40 =
  9. 9.63 + 63 + 55 + 26 =
  10. 10.16 + 74 + 18 + 49 =
  11. 11.12 + 11 + 42 + 56 =
  12. 12.85 + 33 + 78 + 47 =
  13. 13.33 + 39 + 20 + 13 =
  14. 14.68 + 65 + 46 + 48 =
  15. 15.88 + 25 + 77 + 69 =
  16. 16.22 + 32 + 12 + 38 =
  17. 17.54 + 81 + 67 + 20 =
  18. 18.85 + 16 + 27 + 14 =
  19. 19.67 + 82 + 35 + 87 =
  20. 20.31 + 55 + 18 + 84 =
  21. 21.74 + 44 + 70 + 69 =
  22. 22.30 + 18 + 33 + 73 =
  23. 23.22 + 56 + 38 + 43 =
  24. 24.13 + 20 + 33 + 75 =
  25. 25.27 + 17 + 54 + 40 =
  26. 26.19 + 50 + 29 + 18 =
  27. 27.38 + 46 + 19 + 71 =
  28. 28.48 + 12 + 58 + 27 =
  29. 29.65 + 43 + 88 + 43 =
  30. 30.45 + 25 + 61 + 87 =
  31. 31.80 + 42 + 21 + 26 =
  32. 32.45 + 82 + 53 + 66 =
  33. 33.21 + 31 + 51 + 45 =
  34. 34.23 + 23 + 32 + 74 =
  35. 35.75 + 43 + 60 + 15 =
  36. 36.74 + 28 + 18 + 15 =
  37. 37.69 + 86 + 36 + 20 =
  38. 38.70 + 70 + 36 + 83 =
  39. 39.75 + 33 + 70 + 72 =
  40. 40.33 + 67 + 43 + 89 =

Answer key

  1. 188
  2. 184
  3. 242
  4. 231
  5. 144
  6. 247
  7. 160
  8. 189
  9. 207
  10. 157
  11. 121
  12. 243
  13. 105
  14. 227
  15. 259
  16. 104
  17. 222
  18. 142
  19. 271
  20. 188
  21. 257
  22. 154
  23. 159
  24. 141
  25. 138
  26. 116
  27. 174
  28. 145
  29. 239
  30. 218
  31. 169
  32. 246
  33. 148
  34. 152
  35. 193
  36. 135
  37. 211
  38. 259
  39. 250
  40. 232

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