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Mental Addition Worksheet

Speed calculation lesson 5: Running totals · Set 842 · 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. 1.18 + 60 + 52 + 13 =
  2. 2.77 + 12 + 28 + 80 =
  3. 3.33 + 30 + 15 + 87 =
  4. 4.72 + 75 + 28 + 29 =
  5. 5.61 + 14 + 79 + 67 =
  6. 6.64 + 62 + 31 + 37 =
  7. 7.30 + 34 + 15 + 74 =
  8. 8.36 + 62 + 87 + 14 =
  9. 9.25 + 29 + 43 + 15 =
  10. 10.68 + 14 + 68 + 21 =
  11. 11.72 + 28 + 36 + 69 =
  12. 12.13 + 56 + 15 + 89 =
  13. 13.80 + 88 + 11 + 56 =
  14. 14.30 + 15 + 64 + 86 =
  15. 15.85 + 43 + 66 + 57 =
  16. 16.34 + 60 + 86 + 60 =
  17. 17.21 + 79 + 27 + 72 =
  18. 18.19 + 87 + 39 + 21 =
  19. 19.50 + 32 + 18 + 43 =
  20. 20.26 + 83 + 59 + 11 =
  21. 21.72 + 29 + 39 + 49 =
  22. 22.24 + 82 + 41 + 21 =
  23. 23.38 + 31 + 38 + 52 =
  24. 24.82 + 13 + 24 + 50 =
  25. 25.89 + 26 + 13 + 42 =
  26. 26.57 + 53 + 43 + 79 =
  27. 27.35 + 74 + 13 + 74 =
  28. 28.85 + 50 + 33 + 88 =
  29. 29.49 + 23 + 14 + 31 =
  30. 30.83 + 61 + 64 + 20 =
  31. 31.67 + 17 + 66 + 61 =
  32. 32.24 + 21 + 46 + 75 =
  33. 33.80 + 31 + 13 + 76 =
  34. 34.63 + 73 + 72 + 53 =
  35. 35.61 + 72 + 74 + 57 =
  36. 36.20 + 86 + 46 + 66 =
  37. 37.33 + 20 + 81 + 54 =
  38. 38.44 + 41 + 67 + 51 =
  39. 39.56 + 48 + 36 + 41 =
  40. 40.77 + 68 + 16 + 86 =

Answer key

  1. 143
  2. 197
  3. 165
  4. 204
  5. 221
  6. 194
  7. 153
  8. 199
  9. 112
  10. 171
  11. 205
  12. 173
  13. 235
  14. 195
  15. 251
  16. 240
  17. 199
  18. 166
  19. 143
  20. 179
  21. 189
  22. 168
  23. 159
  24. 169
  25. 170
  26. 232
  27. 196
  28. 256
  29. 117
  30. 228
  31. 211
  32. 166
  33. 200
  34. 261
  35. 264
  36. 218
  37. 188
  38. 203
  39. 181
  40. 247

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