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Mental Addition Worksheet

Speed calculation lesson 5: Running totals · Set 662 · 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. 1.13 + 29 + 59 + 59 =
  2. 2.23 + 83 + 14 + 73 =
  3. 3.89 + 59 + 29 + 58 =
  4. 4.56 + 19 + 61 + 72 =
  5. 5.21 + 33 + 36 + 73 =
  6. 6.22 + 59 + 26 + 21 =
  7. 7.28 + 28 + 13 + 83 =
  8. 8.68 + 15 + 47 + 48 =
  9. 9.82 + 89 + 52 + 32 =
  10. 10.82 + 64 + 23 + 89 =
  11. 11.83 + 79 + 55 + 76 =
  12. 12.18 + 42 + 72 + 56 =
  13. 13.11 + 30 + 87 + 37 =
  14. 14.52 + 68 + 82 + 64 =
  15. 15.81 + 17 + 19 + 12 =
  16. 16.28 + 13 + 26 + 33 =
  17. 17.12 + 44 + 76 + 29 =
  18. 18.34 + 32 + 58 + 50 =
  19. 19.23 + 68 + 22 + 58 =
  20. 20.41 + 81 + 32 + 44 =
  21. 21.16 + 26 + 39 + 89 =
  22. 22.80 + 29 + 65 + 40 =
  23. 23.34 + 56 + 89 + 27 =
  24. 24.40 + 86 + 64 + 58 =
  25. 25.24 + 31 + 55 + 24 =
  26. 26.38 + 42 + 88 + 80 =
  27. 27.77 + 27 + 51 + 89 =
  28. 28.85 + 13 + 22 + 84 =
  29. 29.22 + 30 + 25 + 20 =
  30. 30.78 + 27 + 23 + 28 =
  31. 31.15 + 86 + 70 + 82 =
  32. 32.32 + 66 + 22 + 81 =
  33. 33.31 + 17 + 33 + 56 =
  34. 34.72 + 11 + 65 + 61 =
  35. 35.25 + 88 + 55 + 89 =
  36. 36.16 + 72 + 78 + 62 =
  37. 37.62 + 88 + 22 + 21 =
  38. 38.36 + 71 + 30 + 12 =
  39. 39.54 + 31 + 35 + 25 =
  40. 40.27 + 56 + 67 + 22 =

Answer key

  1. 160
  2. 193
  3. 235
  4. 208
  5. 163
  6. 128
  7. 152
  8. 178
  9. 255
  10. 258
  11. 293
  12. 188
  13. 165
  14. 266
  15. 129
  16. 100
  17. 161
  18. 174
  19. 171
  20. 198
  21. 170
  22. 214
  23. 206
  24. 248
  25. 134
  26. 248
  27. 244
  28. 204
  29. 97
  30. 156
  31. 253
  32. 201
  33. 137
  34. 209
  35. 257
  36. 228
  37. 193
  38. 149
  39. 145
  40. 172

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