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Mental Addition Worksheet

Speed calculation lesson 5: Running totals · Set 135 · 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. 1.44 + 42 + 84 + 56 =
  2. 2.26 + 65 + 33 + 74 =
  3. 3.58 + 21 + 33 + 70 =
  4. 4.19 + 46 + 18 + 13 =
  5. 5.83 + 29 + 55 + 84 =
  6. 6.42 + 17 + 76 + 26 =
  7. 7.20 + 68 + 24 + 16 =
  8. 8.11 + 36 + 86 + 67 =
  9. 9.34 + 81 + 16 + 62 =
  10. 10.27 + 59 + 31 + 11 =
  11. 11.37 + 62 + 28 + 30 =
  12. 12.40 + 44 + 51 + 74 =
  13. 13.86 + 40 + 47 + 54 =
  14. 14.15 + 16 + 43 + 32 =
  15. 15.28 + 30 + 77 + 66 =
  16. 16.46 + 40 + 38 + 84 =
  17. 17.36 + 68 + 12 + 32 =
  18. 18.12 + 49 + 59 + 80 =
  19. 19.70 + 85 + 68 + 12 =
  20. 20.22 + 45 + 54 + 68 =
  21. 21.68 + 82 + 56 + 34 =
  22. 22.82 + 53 + 30 + 59 =
  23. 23.15 + 68 + 66 + 89 =
  24. 24.71 + 61 + 47 + 32 =
  25. 25.32 + 18 + 85 + 56 =
  26. 26.33 + 36 + 68 + 88 =
  27. 27.83 + 53 + 67 + 19 =
  28. 28.13 + 18 + 22 + 30 =
  29. 29.73 + 54 + 29 + 14 =
  30. 30.61 + 26 + 45 + 66 =
  31. 31.87 + 78 + 72 + 81 =
  32. 32.26 + 64 + 38 + 89 =
  33. 33.19 + 25 + 41 + 67 =
  34. 34.73 + 29 + 28 + 71 =
  35. 35.85 + 23 + 72 + 73 =
  36. 36.60 + 65 + 75 + 22 =
  37. 37.29 + 48 + 38 + 69 =
  38. 38.49 + 84 + 61 + 56 =
  39. 39.29 + 19 + 17 + 33 =
  40. 40.12 + 52 + 29 + 69 =

Answer key

  1. 226
  2. 198
  3. 182
  4. 96
  5. 251
  6. 161
  7. 128
  8. 200
  9. 193
  10. 128
  11. 157
  12. 209
  13. 227
  14. 106
  15. 201
  16. 208
  17. 148
  18. 200
  19. 235
  20. 189
  21. 240
  22. 224
  23. 238
  24. 211
  25. 191
  26. 225
  27. 222
  28. 83
  29. 170
  30. 198
  31. 318
  32. 217
  33. 152
  34. 201
  35. 253
  36. 222
  37. 184
  38. 250
  39. 98
  40. 162

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