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Mental Addition Worksheet

Speed calculation lesson 5: Running totals · Set 889 · 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. 1.39 + 32 + 65 + 41 =
  2. 2.57 + 11 + 79 + 34 =
  3. 3.71 + 46 + 69 + 68 =
  4. 4.68 + 66 + 15 + 67 =
  5. 5.88 + 34 + 44 + 62 =
  6. 6.30 + 50 + 29 + 59 =
  7. 7.26 + 44 + 40 + 84 =
  8. 8.31 + 85 + 69 + 71 =
  9. 9.11 + 58 + 26 + 43 =
  10. 10.43 + 32 + 13 + 60 =
  11. 11.51 + 84 + 32 + 86 =
  12. 12.28 + 20 + 58 + 44 =
  13. 13.82 + 63 + 37 + 60 =
  14. 14.32 + 33 + 72 + 17 =
  15. 15.60 + 26 + 71 + 36 =
  16. 16.57 + 51 + 26 + 68 =
  17. 17.40 + 83 + 75 + 86 =
  18. 18.65 + 19 + 77 + 84 =
  19. 19.52 + 58 + 69 + 19 =
  20. 20.66 + 53 + 41 + 24 =
  21. 21.18 + 65 + 85 + 28 =
  22. 22.14 + 40 + 24 + 76 =
  23. 23.13 + 79 + 20 + 13 =
  24. 24.22 + 77 + 16 + 33 =
  25. 25.80 + 27 + 55 + 30 =
  26. 26.19 + 27 + 63 + 39 =
  27. 27.55 + 37 + 80 + 41 =
  28. 28.89 + 73 + 60 + 24 =
  29. 29.56 + 50 + 15 + 21 =
  30. 30.40 + 35 + 82 + 68 =
  31. 31.77 + 85 + 34 + 28 =
  32. 32.29 + 84 + 40 + 34 =
  33. 33.58 + 20 + 37 + 12 =
  34. 34.44 + 57 + 42 + 22 =
  35. 35.60 + 76 + 79 + 61 =
  36. 36.28 + 12 + 55 + 61 =
  37. 37.17 + 61 + 42 + 28 =
  38. 38.27 + 83 + 46 + 53 =
  39. 39.30 + 67 + 74 + 32 =
  40. 40.28 + 40 + 81 + 23 =

Answer key

  1. 177
  2. 181
  3. 254
  4. 216
  5. 228
  6. 168
  7. 194
  8. 256
  9. 138
  10. 148
  11. 253
  12. 150
  13. 242
  14. 154
  15. 193
  16. 202
  17. 284
  18. 245
  19. 198
  20. 184
  21. 196
  22. 154
  23. 125
  24. 148
  25. 192
  26. 148
  27. 213
  28. 246
  29. 142
  30. 225
  31. 224
  32. 187
  33. 127
  34. 165
  35. 276
  36. 156
  37. 148
  38. 209
  39. 203
  40. 172

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