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Mental Addition Worksheet

Speed calculation lesson 5: Running totals · Set 929 · 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. 1.47 + 13 + 42 + 87 =
  2. 2.44 + 72 + 83 + 85 =
  3. 3.25 + 40 + 41 + 43 =
  4. 4.26 + 88 + 41 + 73 =
  5. 5.74 + 29 + 88 + 20 =
  6. 6.74 + 64 + 64 + 32 =
  7. 7.56 + 68 + 13 + 60 =
  8. 8.64 + 29 + 69 + 18 =
  9. 9.12 + 48 + 41 + 73 =
  10. 10.42 + 19 + 50 + 80 =
  11. 11.13 + 23 + 61 + 75 =
  12. 12.56 + 13 + 89 + 81 =
  13. 13.18 + 17 + 36 + 76 =
  14. 14.61 + 11 + 12 + 42 =
  15. 15.30 + 57 + 82 + 27 =
  16. 16.65 + 63 + 12 + 54 =
  17. 17.32 + 51 + 81 + 78 =
  18. 18.38 + 66 + 45 + 79 =
  19. 19.47 + 43 + 44 + 88 =
  20. 20.61 + 53 + 57 + 16 =
  21. 21.43 + 51 + 24 + 31 =
  22. 22.31 + 44 + 63 + 13 =
  23. 23.18 + 80 + 18 + 16 =
  24. 24.61 + 11 + 33 + 71 =
  25. 25.30 + 48 + 49 + 14 =
  26. 26.24 + 86 + 75 + 66 =
  27. 27.11 + 88 + 30 + 37 =
  28. 28.66 + 29 + 16 + 49 =
  29. 29.88 + 20 + 88 + 73 =
  30. 30.13 + 21 + 25 + 61 =
  31. 31.14 + 13 + 25 + 15 =
  32. 32.62 + 82 + 50 + 13 =
  33. 33.66 + 27 + 59 + 48 =
  34. 34.86 + 66 + 68 + 26 =
  35. 35.67 + 31 + 21 + 75 =
  36. 36.30 + 88 + 33 + 17 =
  37. 37.13 + 34 + 88 + 13 =
  38. 38.14 + 20 + 17 + 33 =
  39. 39.25 + 25 + 84 + 66 =
  40. 40.82 + 16 + 14 + 45 =

Answer key

  1. 189
  2. 284
  3. 149
  4. 228
  5. 211
  6. 234
  7. 197
  8. 180
  9. 174
  10. 191
  11. 172
  12. 239
  13. 147
  14. 126
  15. 196
  16. 194
  17. 242
  18. 228
  19. 222
  20. 187
  21. 149
  22. 151
  23. 132
  24. 176
  25. 141
  26. 251
  27. 166
  28. 160
  29. 269
  30. 120
  31. 67
  32. 207
  33. 200
  34. 246
  35. 194
  36. 168
  37. 148
  38. 84
  39. 200
  40. 157

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