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Mental Addition Worksheet

Speed calculation lesson 5: Running totals · Set 509 · 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. 1.22 + 60 + 45 + 13 =
  2. 2.14 + 29 + 24 + 63 =
  3. 3.31 + 27 + 72 + 23 =
  4. 4.79 + 63 + 38 + 54 =
  5. 5.24 + 51 + 48 + 60 =
  6. 6.12 + 88 + 76 + 87 =
  7. 7.44 + 71 + 22 + 37 =
  8. 8.60 + 14 + 19 + 80 =
  9. 9.51 + 39 + 21 + 77 =
  10. 10.83 + 45 + 47 + 74 =
  11. 11.15 + 12 + 33 + 68 =
  12. 12.74 + 73 + 47 + 29 =
  13. 13.68 + 81 + 88 + 51 =
  14. 14.59 + 74 + 11 + 25 =
  15. 15.46 + 71 + 26 + 31 =
  16. 16.20 + 46 + 15 + 79 =
  17. 17.85 + 81 + 37 + 63 =
  18. 18.13 + 50 + 46 + 11 =
  19. 19.19 + 35 + 65 + 52 =
  20. 20.27 + 57 + 49 + 72 =
  21. 21.21 + 77 + 22 + 33 =
  22. 22.66 + 22 + 48 + 39 =
  23. 23.76 + 84 + 55 + 21 =
  24. 24.88 + 24 + 55 + 73 =
  25. 25.21 + 80 + 60 + 49 =
  26. 26.38 + 24 + 64 + 83 =
  27. 27.14 + 33 + 40 + 15 =
  28. 28.35 + 73 + 84 + 56 =
  29. 29.75 + 74 + 14 + 23 =
  30. 30.43 + 21 + 22 + 78 =
  31. 31.49 + 42 + 62 + 69 =
  32. 32.42 + 18 + 39 + 65 =
  33. 33.24 + 58 + 30 + 36 =
  34. 34.33 + 82 + 52 + 81 =
  35. 35.52 + 62 + 77 + 33 =
  36. 36.87 + 29 + 45 + 14 =
  37. 37.24 + 84 + 64 + 41 =
  38. 38.77 + 77 + 56 + 17 =
  39. 39.82 + 33 + 54 + 66 =
  40. 40.42 + 20 + 55 + 82 =

Answer key

  1. 140
  2. 130
  3. 153
  4. 234
  5. 183
  6. 263
  7. 174
  8. 173
  9. 188
  10. 249
  11. 128
  12. 223
  13. 288
  14. 169
  15. 174
  16. 160
  17. 266
  18. 120
  19. 171
  20. 205
  21. 153
  22. 175
  23. 236
  24. 240
  25. 210
  26. 209
  27. 102
  28. 248
  29. 186
  30. 164
  31. 222
  32. 164
  33. 148
  34. 248
  35. 224
  36. 175
  37. 213
  38. 227
  39. 235
  40. 199

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