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Mental Addition Worksheet

Speed calculation lesson 5: Running totals · Set 98 · 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. 1.54 + 20 + 85 + 62 =
  2. 2.34 + 82 + 61 + 71 =
  3. 3.57 + 43 + 42 + 32 =
  4. 4.36 + 13 + 33 + 43 =
  5. 5.34 + 70 + 67 + 36 =
  6. 6.31 + 22 + 13 + 72 =
  7. 7.49 + 33 + 29 + 46 =
  8. 8.16 + 18 + 23 + 51 =
  9. 9.12 + 68 + 63 + 86 =
  10. 10.77 + 70 + 63 + 26 =
  11. 11.72 + 82 + 39 + 68 =
  12. 12.46 + 18 + 33 + 18 =
  13. 13.20 + 41 + 73 + 76 =
  14. 14.27 + 17 + 33 + 59 =
  15. 15.43 + 54 + 31 + 30 =
  16. 16.23 + 14 + 86 + 75 =
  17. 17.61 + 64 + 71 + 26 =
  18. 18.14 + 72 + 48 + 34 =
  19. 19.11 + 40 + 67 + 56 =
  20. 20.33 + 28 + 45 + 13 =
  21. 21.36 + 56 + 15 + 14 =
  22. 22.67 + 19 + 44 + 38 =
  23. 23.64 + 53 + 69 + 70 =
  24. 24.82 + 27 + 74 + 17 =
  25. 25.47 + 82 + 74 + 29 =
  26. 26.24 + 20 + 13 + 46 =
  27. 27.32 + 12 + 51 + 74 =
  28. 28.35 + 43 + 43 + 16 =
  29. 29.15 + 19 + 32 + 78 =
  30. 30.87 + 44 + 17 + 51 =
  31. 31.37 + 40 + 33 + 59 =
  32. 32.26 + 66 + 30 + 28 =
  33. 33.19 + 57 + 23 + 51 =
  34. 34.85 + 51 + 25 + 48 =
  35. 35.69 + 67 + 88 + 19 =
  36. 36.77 + 84 + 88 + 59 =
  37. 37.71 + 73 + 77 + 75 =
  38. 38.44 + 46 + 34 + 29 =
  39. 39.21 + 51 + 70 + 86 =
  40. 40.17 + 85 + 83 + 34 =

Answer key

  1. 221
  2. 248
  3. 174
  4. 125
  5. 207
  6. 138
  7. 157
  8. 108
  9. 229
  10. 236
  11. 261
  12. 115
  13. 210
  14. 136
  15. 158
  16. 198
  17. 222
  18. 168
  19. 174
  20. 119
  21. 121
  22. 168
  23. 256
  24. 200
  25. 232
  26. 103
  27. 169
  28. 137
  29. 144
  30. 199
  31. 169
  32. 150
  33. 150
  34. 209
  35. 243
  36. 308
  37. 296
  38. 153
  39. 228
  40. 219

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