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Mental Addition Worksheet

Speed calculation lesson 5: Running totals · Set 672 · 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. 1.65 + 47 + 63 + 48 =
  2. 2.51 + 28 + 11 + 64 =
  3. 3.13 + 72 + 34 + 50 =
  4. 4.56 + 77 + 39 + 14 =
  5. 5.14 + 88 + 18 + 20 =
  6. 6.44 + 66 + 29 + 78 =
  7. 7.29 + 63 + 24 + 29 =
  8. 8.20 + 14 + 59 + 16 =
  9. 9.61 + 32 + 35 + 46 =
  10. 10.20 + 80 + 35 + 88 =
  11. 11.11 + 50 + 30 + 31 =
  12. 12.61 + 60 + 73 + 61 =
  13. 13.30 + 65 + 63 + 69 =
  14. 14.41 + 77 + 85 + 26 =
  15. 15.62 + 79 + 13 + 74 =
  16. 16.82 + 71 + 28 + 28 =
  17. 17.83 + 40 + 77 + 16 =
  18. 18.21 + 82 + 57 + 43 =
  19. 19.78 + 83 + 12 + 79 =
  20. 20.89 + 86 + 72 + 47 =
  21. 21.77 + 26 + 39 + 28 =
  22. 22.15 + 86 + 22 + 38 =
  23. 23.59 + 25 + 13 + 20 =
  24. 24.20 + 32 + 71 + 55 =
  25. 25.79 + 60 + 53 + 51 =
  26. 26.77 + 42 + 86 + 86 =
  27. 27.63 + 64 + 71 + 21 =
  28. 28.40 + 69 + 57 + 15 =
  29. 29.52 + 22 + 27 + 53 =
  30. 30.81 + 85 + 33 + 57 =
  31. 31.53 + 84 + 19 + 40 =
  32. 32.50 + 45 + 23 + 53 =
  33. 33.37 + 54 + 42 + 22 =
  34. 34.13 + 40 + 88 + 11 =
  35. 35.41 + 33 + 61 + 75 =
  36. 36.78 + 77 + 24 + 70 =
  37. 37.68 + 52 + 59 + 30 =
  38. 38.11 + 17 + 72 + 22 =
  39. 39.32 + 47 + 44 + 46 =
  40. 40.15 + 36 + 35 + 21 =

Answer key

  1. 223
  2. 154
  3. 169
  4. 186
  5. 140
  6. 217
  7. 145
  8. 109
  9. 174
  10. 223
  11. 122
  12. 255
  13. 227
  14. 229
  15. 228
  16. 209
  17. 216
  18. 203
  19. 252
  20. 294
  21. 170
  22. 161
  23. 117
  24. 178
  25. 243
  26. 291
  27. 219
  28. 181
  29. 154
  30. 256
  31. 196
  32. 171
  33. 155
  34. 152
  35. 210
  36. 249
  37. 209
  38. 122
  39. 169
  40. 107

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