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Mental Addition Worksheet

Speed calculation lesson 5: Running totals · Set 902 · 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. 1.57 + 12 + 80 + 73 =
  2. 2.45 + 22 + 82 + 81 =
  3. 3.61 + 66 + 31 + 79 =
  4. 4.18 + 78 + 76 + 29 =
  5. 5.49 + 40 + 24 + 53 =
  6. 6.88 + 84 + 12 + 44 =
  7. 7.59 + 17 + 23 + 86 =
  8. 8.38 + 27 + 84 + 69 =
  9. 9.62 + 28 + 45 + 17 =
  10. 10.49 + 41 + 28 + 62 =
  11. 11.81 + 56 + 77 + 54 =
  12. 12.80 + 11 + 64 + 17 =
  13. 13.79 + 43 + 36 + 19 =
  14. 14.84 + 79 + 32 + 19 =
  15. 15.57 + 61 + 72 + 45 =
  16. 16.67 + 34 + 76 + 47 =
  17. 17.42 + 80 + 27 + 20 =
  18. 18.55 + 13 + 48 + 76 =
  19. 19.62 + 74 + 53 + 49 =
  20. 20.65 + 67 + 47 + 49 =
  21. 21.75 + 50 + 26 + 84 =
  22. 22.25 + 11 + 64 + 30 =
  23. 23.52 + 28 + 70 + 68 =
  24. 24.35 + 85 + 11 + 38 =
  25. 25.82 + 11 + 42 + 54 =
  26. 26.19 + 79 + 27 + 18 =
  27. 27.82 + 57 + 11 + 80 =
  28. 28.64 + 11 + 29 + 83 =
  29. 29.53 + 24 + 76 + 86 =
  30. 30.84 + 67 + 70 + 45 =
  31. 31.79 + 60 + 52 + 79 =
  32. 32.82 + 33 + 60 + 44 =
  33. 33.63 + 43 + 25 + 58 =
  34. 34.64 + 88 + 22 + 20 =
  35. 35.78 + 33 + 22 + 51 =
  36. 36.80 + 73 + 87 + 73 =
  37. 37.89 + 52 + 53 + 51 =
  38. 38.33 + 76 + 32 + 52 =
  39. 39.24 + 59 + 31 + 33 =
  40. 40.42 + 47 + 40 + 80 =

Answer key

  1. 222
  2. 230
  3. 237
  4. 201
  5. 166
  6. 228
  7. 185
  8. 218
  9. 152
  10. 180
  11. 268
  12. 172
  13. 177
  14. 214
  15. 235
  16. 224
  17. 169
  18. 192
  19. 238
  20. 228
  21. 235
  22. 130
  23. 218
  24. 169
  25. 189
  26. 143
  27. 230
  28. 187
  29. 239
  30. 266
  31. 270
  32. 219
  33. 189
  34. 194
  35. 184
  36. 313
  37. 245
  38. 193
  39. 147
  40. 209

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