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Mental Addition Worksheet

Speed calculation lesson 5: Running totals · Set 799 · 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. 1.62 + 40 + 80 + 30 =
  2. 2.47 + 13 + 61 + 37 =
  3. 3.26 + 77 + 76 + 62 =
  4. 4.42 + 62 + 75 + 46 =
  5. 5.25 + 11 + 61 + 37 =
  6. 6.76 + 28 + 74 + 79 =
  7. 7.76 + 75 + 35 + 31 =
  8. 8.30 + 34 + 24 + 81 =
  9. 9.27 + 50 + 14 + 18 =
  10. 10.18 + 71 + 67 + 22 =
  11. 11.29 + 16 + 80 + 67 =
  12. 12.70 + 51 + 44 + 44 =
  13. 13.11 + 47 + 57 + 25 =
  14. 14.57 + 21 + 22 + 24 =
  15. 15.55 + 78 + 21 + 49 =
  16. 16.12 + 89 + 68 + 56 =
  17. 17.54 + 69 + 83 + 63 =
  18. 18.82 + 55 + 66 + 33 =
  19. 19.43 + 87 + 26 + 89 =
  20. 20.65 + 72 + 30 + 84 =
  21. 21.43 + 14 + 56 + 59 =
  22. 22.81 + 56 + 23 + 33 =
  23. 23.81 + 63 + 38 + 11 =
  24. 24.31 + 53 + 25 + 64 =
  25. 25.69 + 74 + 11 + 82 =
  26. 26.73 + 51 + 70 + 48 =
  27. 27.47 + 43 + 30 + 62 =
  28. 28.81 + 20 + 81 + 53 =
  29. 29.50 + 82 + 58 + 20 =
  30. 30.62 + 25 + 25 + 17 =
  31. 31.86 + 43 + 32 + 48 =
  32. 32.17 + 11 + 73 + 88 =
  33. 33.77 + 45 + 89 + 70 =
  34. 34.70 + 69 + 37 + 22 =
  35. 35.44 + 88 + 40 + 26 =
  36. 36.75 + 48 + 64 + 33 =
  37. 37.38 + 72 + 52 + 70 =
  38. 38.43 + 15 + 79 + 44 =
  39. 39.58 + 61 + 79 + 88 =
  40. 40.61 + 76 + 69 + 48 =

Answer key

  1. 212
  2. 158
  3. 241
  4. 225
  5. 134
  6. 257
  7. 217
  8. 169
  9. 109
  10. 178
  11. 192
  12. 209
  13. 140
  14. 124
  15. 203
  16. 225
  17. 269
  18. 236
  19. 245
  20. 251
  21. 172
  22. 193
  23. 193
  24. 173
  25. 236
  26. 242
  27. 182
  28. 235
  29. 210
  30. 129
  31. 209
  32. 189
  33. 281
  34. 198
  35. 198
  36. 220
  37. 232
  38. 181
  39. 286
  40. 254

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