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Mental Addition Worksheet

Speed calculation lesson 5: Running totals · Set 593 · 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. 1.36 + 18 + 50 + 56 =
  2. 2.76 + 22 + 26 + 83 =
  3. 3.64 + 16 + 75 + 32 =
  4. 4.60 + 32 + 82 + 77 =
  5. 5.64 + 46 + 46 + 21 =
  6. 6.38 + 35 + 79 + 28 =
  7. 7.41 + 24 + 87 + 33 =
  8. 8.25 + 61 + 86 + 51 =
  9. 9.49 + 36 + 37 + 19 =
  10. 10.25 + 64 + 84 + 78 =
  11. 11.17 + 70 + 72 + 19 =
  12. 12.32 + 24 + 25 + 71 =
  13. 13.80 + 11 + 39 + 24 =
  14. 14.32 + 15 + 56 + 62 =
  15. 15.17 + 47 + 53 + 71 =
  16. 16.63 + 72 + 78 + 89 =
  17. 17.43 + 18 + 30 + 52 =
  18. 18.88 + 63 + 45 + 45 =
  19. 19.73 + 39 + 45 + 56 =
  20. 20.22 + 23 + 16 + 16 =
  21. 21.45 + 36 + 86 + 54 =
  22. 22.88 + 73 + 29 + 59 =
  23. 23.24 + 39 + 32 + 47 =
  24. 24.59 + 44 + 49 + 52 =
  25. 25.43 + 88 + 26 + 39 =
  26. 26.70 + 22 + 21 + 55 =
  27. 27.64 + 24 + 34 + 49 =
  28. 28.61 + 63 + 33 + 38 =
  29. 29.50 + 16 + 57 + 15 =
  30. 30.62 + 83 + 46 + 37 =
  31. 31.55 + 80 + 80 + 34 =
  32. 32.73 + 37 + 64 + 25 =
  33. 33.53 + 14 + 57 + 11 =
  34. 34.55 + 54 + 58 + 53 =
  35. 35.77 + 76 + 50 + 12 =
  36. 36.35 + 28 + 69 + 81 =
  37. 37.50 + 32 + 74 + 13 =
  38. 38.48 + 57 + 75 + 44 =
  39. 39.86 + 53 + 82 + 37 =
  40. 40.14 + 18 + 24 + 19 =

Answer key

  1. 160
  2. 207
  3. 187
  4. 251
  5. 177
  6. 180
  7. 185
  8. 223
  9. 141
  10. 251
  11. 178
  12. 152
  13. 154
  14. 165
  15. 188
  16. 302
  17. 143
  18. 241
  19. 213
  20. 77
  21. 221
  22. 249
  23. 142
  24. 204
  25. 196
  26. 168
  27. 171
  28. 195
  29. 138
  30. 228
  31. 249
  32. 199
  33. 135
  34. 220
  35. 215
  36. 213
  37. 169
  38. 224
  39. 258
  40. 75

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