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Mental Addition Worksheet

Speed calculation lesson 5: Running totals · Set 620 · 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. 1.63 + 42 + 48 + 79 =
  2. 2.11 + 62 + 70 + 56 =
  3. 3.49 + 33 + 86 + 44 =
  4. 4.75 + 42 + 78 + 27 =
  5. 5.59 + 13 + 35 + 15 =
  6. 6.25 + 52 + 73 + 24 =
  7. 7.29 + 24 + 75 + 39 =
  8. 8.64 + 77 + 77 + 28 =
  9. 9.26 + 32 + 80 + 30 =
  10. 10.23 + 61 + 85 + 16 =
  11. 11.18 + 13 + 42 + 70 =
  12. 12.78 + 55 + 69 + 76 =
  13. 13.38 + 89 + 33 + 37 =
  14. 14.89 + 58 + 79 + 81 =
  15. 15.36 + 53 + 22 + 55 =
  16. 16.75 + 25 + 49 + 52 =
  17. 17.73 + 86 + 44 + 80 =
  18. 18.22 + 30 + 15 + 32 =
  19. 19.28 + 38 + 56 + 62 =
  20. 20.37 + 25 + 25 + 66 =
  21. 21.16 + 63 + 27 + 85 =
  22. 22.57 + 77 + 57 + 48 =
  23. 23.74 + 47 + 25 + 63 =
  24. 24.16 + 67 + 40 + 47 =
  25. 25.26 + 36 + 85 + 15 =
  26. 26.75 + 67 + 83 + 27 =
  27. 27.50 + 29 + 59 + 56 =
  28. 28.89 + 47 + 72 + 12 =
  29. 29.28 + 60 + 71 + 46 =
  30. 30.43 + 45 + 51 + 13 =
  31. 31.70 + 22 + 78 + 29 =
  32. 32.71 + 20 + 62 + 17 =
  33. 33.79 + 14 + 69 + 22 =
  34. 34.69 + 13 + 51 + 63 =
  35. 35.84 + 79 + 55 + 46 =
  36. 36.42 + 26 + 69 + 32 =
  37. 37.42 + 22 + 33 + 16 =
  38. 38.82 + 84 + 12 + 81 =
  39. 39.34 + 26 + 27 + 78 =
  40. 40.68 + 25 + 40 + 50 =

Answer key

  1. 232
  2. 199
  3. 212
  4. 222
  5. 122
  6. 174
  7. 167
  8. 246
  9. 168
  10. 185
  11. 143
  12. 278
  13. 197
  14. 307
  15. 166
  16. 201
  17. 283
  18. 99
  19. 184
  20. 153
  21. 191
  22. 239
  23. 209
  24. 170
  25. 162
  26. 252
  27. 194
  28. 220
  29. 205
  30. 152
  31. 199
  32. 170
  33. 184
  34. 196
  35. 264
  36. 169
  37. 113
  38. 259
  39. 165
  40. 183

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