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Mental Addition Worksheet

Speed calculation lesson 5: Running totals · Set 472 · 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 + 71 + 19 + 45 =
  2. 2.84 + 60 + 34 + 65 =
  3. 3.28 + 87 + 83 + 58 =
  4. 4.26 + 69 + 79 + 28 =
  5. 5.20 + 21 + 31 + 34 =
  6. 6.11 + 55 + 44 + 82 =
  7. 7.27 + 43 + 71 + 85 =
  8. 8.43 + 36 + 87 + 56 =
  9. 9.19 + 19 + 67 + 23 =
  10. 10.30 + 44 + 59 + 40 =
  11. 11.29 + 21 + 43 + 67 =
  12. 12.23 + 83 + 85 + 45 =
  13. 13.41 + 12 + 64 + 51 =
  14. 14.51 + 20 + 24 + 86 =
  15. 15.59 + 71 + 54 + 65 =
  16. 16.48 + 32 + 37 + 76 =
  17. 17.17 + 21 + 20 + 81 =
  18. 18.71 + 41 + 41 + 73 =
  19. 19.87 + 72 + 87 + 80 =
  20. 20.33 + 64 + 56 + 55 =
  21. 21.29 + 33 + 63 + 84 =
  22. 22.35 + 88 + 66 + 88 =
  23. 23.15 + 56 + 63 + 15 =
  24. 24.33 + 40 + 21 + 61 =
  25. 25.72 + 51 + 17 + 87 =
  26. 26.39 + 71 + 56 + 59 =
  27. 27.64 + 81 + 87 + 73 =
  28. 28.42 + 30 + 17 + 80 =
  29. 29.21 + 32 + 72 + 46 =
  30. 30.25 + 53 + 39 + 47 =
  31. 31.73 + 51 + 58 + 65 =
  32. 32.71 + 17 + 22 + 52 =
  33. 33.61 + 60 + 88 + 66 =
  34. 34.73 + 89 + 87 + 13 =
  35. 35.49 + 40 + 29 + 23 =
  36. 36.36 + 78 + 17 + 59 =
  37. 37.41 + 86 + 55 + 75 =
  38. 38.56 + 54 + 58 + 17 =
  39. 39.26 + 58 + 69 + 76 =
  40. 40.59 + 17 + 62 + 67 =

Answer key

  1. 157
  2. 243
  3. 256
  4. 202
  5. 106
  6. 192
  7. 226
  8. 222
  9. 128
  10. 173
  11. 160
  12. 236
  13. 168
  14. 181
  15. 249
  16. 193
  17. 139
  18. 226
  19. 326
  20. 208
  21. 209
  22. 277
  23. 149
  24. 155
  25. 227
  26. 225
  27. 305
  28. 169
  29. 171
  30. 164
  31. 247
  32. 162
  33. 275
  34. 262
  35. 141
  36. 190
  37. 257
  38. 185
  39. 229
  40. 205

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