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Mental Addition Worksheet

Speed calculation lesson 5: Running totals · Set 707 · 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. 1.21 + 61 + 18 + 39 =
  2. 2.16 + 21 + 36 + 23 =
  3. 3.54 + 42 + 80 + 49 =
  4. 4.62 + 80 + 29 + 13 =
  5. 5.45 + 43 + 21 + 38 =
  6. 6.70 + 88 + 78 + 24 =
  7. 7.16 + 76 + 86 + 55 =
  8. 8.55 + 42 + 88 + 28 =
  9. 9.85 + 41 + 18 + 74 =
  10. 10.74 + 27 + 39 + 82 =
  11. 11.85 + 21 + 12 + 53 =
  12. 12.49 + 24 + 64 + 24 =
  13. 13.78 + 33 + 55 + 50 =
  14. 14.18 + 89 + 12 + 17 =
  15. 15.38 + 14 + 16 + 56 =
  16. 16.33 + 84 + 77 + 66 =
  17. 17.63 + 58 + 24 + 45 =
  18. 18.11 + 29 + 59 + 71 =
  19. 19.16 + 85 + 70 + 39 =
  20. 20.31 + 70 + 70 + 41 =
  21. 21.47 + 19 + 56 + 19 =
  22. 22.20 + 42 + 77 + 14 =
  23. 23.41 + 75 + 23 + 80 =
  24. 24.14 + 72 + 35 + 85 =
  25. 25.21 + 31 + 47 + 56 =
  26. 26.15 + 21 + 67 + 29 =
  27. 27.71 + 80 + 21 + 44 =
  28. 28.80 + 85 + 34 + 41 =
  29. 29.75 + 39 + 62 + 24 =
  30. 30.42 + 37 + 35 + 75 =
  31. 31.83 + 57 + 79 + 24 =
  32. 32.78 + 48 + 65 + 45 =
  33. 33.75 + 87 + 35 + 49 =
  34. 34.41 + 13 + 18 + 70 =
  35. 35.54 + 73 + 85 + 40 =
  36. 36.70 + 16 + 40 + 50 =
  37. 37.51 + 51 + 63 + 89 =
  38. 38.44 + 73 + 77 + 49 =
  39. 39.42 + 25 + 67 + 73 =
  40. 40.54 + 16 + 44 + 19 =

Answer key

  1. 139
  2. 96
  3. 225
  4. 184
  5. 147
  6. 260
  7. 233
  8. 213
  9. 218
  10. 222
  11. 171
  12. 161
  13. 216
  14. 136
  15. 124
  16. 260
  17. 190
  18. 170
  19. 210
  20. 212
  21. 141
  22. 153
  23. 219
  24. 206
  25. 155
  26. 132
  27. 216
  28. 240
  29. 200
  30. 189
  31. 243
  32. 236
  33. 246
  34. 142
  35. 252
  36. 176
  37. 254
  38. 243
  39. 207
  40. 133

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