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Mental Addition Worksheet

Speed calculation lesson 5: Running totals · Set 144 · 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. 1.85 + 19 + 88 + 51 =
  2. 2.15 + 19 + 41 + 72 =
  3. 3.63 + 60 + 75 + 26 =
  4. 4.33 + 73 + 20 + 29 =
  5. 5.54 + 31 + 50 + 58 =
  6. 6.75 + 14 + 47 + 41 =
  7. 7.67 + 66 + 56 + 52 =
  8. 8.69 + 38 + 36 + 24 =
  9. 9.52 + 71 + 61 + 71 =
  10. 10.17 + 48 + 36 + 55 =
  11. 11.15 + 14 + 23 + 29 =
  12. 12.43 + 11 + 27 + 32 =
  13. 13.65 + 89 + 19 + 66 =
  14. 14.67 + 48 + 76 + 84 =
  15. 15.67 + 74 + 38 + 68 =
  16. 16.22 + 68 + 70 + 17 =
  17. 17.75 + 22 + 63 + 30 =
  18. 18.33 + 24 + 89 + 63 =
  19. 19.22 + 57 + 36 + 59 =
  20. 20.55 + 37 + 60 + 62 =
  21. 21.27 + 43 + 60 + 82 =
  22. 22.27 + 23 + 82 + 64 =
  23. 23.44 + 56 + 24 + 31 =
  24. 24.73 + 14 + 50 + 25 =
  25. 25.28 + 79 + 41 + 60 =
  26. 26.69 + 54 + 41 + 26 =
  27. 27.15 + 73 + 64 + 79 =
  28. 28.35 + 55 + 65 + 19 =
  29. 29.81 + 32 + 26 + 81 =
  30. 30.57 + 27 + 70 + 13 =
  31. 31.69 + 17 + 57 + 36 =
  32. 32.21 + 22 + 27 + 78 =
  33. 33.38 + 45 + 70 + 76 =
  34. 34.66 + 21 + 61 + 22 =
  35. 35.69 + 64 + 16 + 35 =
  36. 36.50 + 87 + 22 + 79 =
  37. 37.22 + 22 + 32 + 45 =
  38. 38.77 + 28 + 18 + 23 =
  39. 39.80 + 76 + 28 + 17 =
  40. 40.48 + 88 + 43 + 25 =

Answer key

  1. 243
  2. 147
  3. 224
  4. 155
  5. 193
  6. 177
  7. 241
  8. 167
  9. 255
  10. 156
  11. 81
  12. 113
  13. 239
  14. 275
  15. 247
  16. 177
  17. 190
  18. 209
  19. 174
  20. 214
  21. 212
  22. 196
  23. 155
  24. 162
  25. 208
  26. 190
  27. 231
  28. 174
  29. 220
  30. 167
  31. 179
  32. 148
  33. 229
  34. 170
  35. 184
  36. 238
  37. 121
  38. 146
  39. 201
  40. 204

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