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Mental Addition Worksheet

Speed calculation lesson 5: Running totals · Set 419 · 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. 1.47 + 22 + 70 + 72 =
  2. 2.25 + 34 + 84 + 11 =
  3. 3.71 + 52 + 61 + 51 =
  4. 4.74 + 42 + 66 + 11 =
  5. 5.16 + 67 + 46 + 63 =
  6. 6.79 + 56 + 33 + 13 =
  7. 7.52 + 74 + 53 + 26 =
  8. 8.42 + 13 + 16 + 46 =
  9. 9.73 + 61 + 70 + 89 =
  10. 10.34 + 57 + 78 + 84 =
  11. 11.30 + 55 + 74 + 81 =
  12. 12.56 + 69 + 56 + 22 =
  13. 13.49 + 87 + 59 + 61 =
  14. 14.61 + 71 + 29 + 37 =
  15. 15.75 + 25 + 88 + 65 =
  16. 16.29 + 24 + 28 + 53 =
  17. 17.38 + 15 + 12 + 26 =
  18. 18.58 + 57 + 79 + 54 =
  19. 19.25 + 83 + 78 + 20 =
  20. 20.88 + 84 + 82 + 51 =
  21. 21.48 + 30 + 32 + 37 =
  22. 22.26 + 22 + 14 + 17 =
  23. 23.27 + 31 + 75 + 33 =
  24. 24.43 + 55 + 81 + 69 =
  25. 25.43 + 51 + 34 + 55 =
  26. 26.84 + 38 + 56 + 11 =
  27. 27.62 + 63 + 56 + 44 =
  28. 28.23 + 17 + 33 + 17 =
  29. 29.57 + 22 + 13 + 87 =
  30. 30.28 + 18 + 68 + 14 =
  31. 31.34 + 78 + 30 + 86 =
  32. 32.77 + 29 + 80 + 39 =
  33. 33.47 + 59 + 72 + 18 =
  34. 34.23 + 34 + 49 + 76 =
  35. 35.48 + 78 + 48 + 43 =
  36. 36.74 + 50 + 57 + 69 =
  37. 37.62 + 38 + 21 + 79 =
  38. 38.58 + 48 + 38 + 57 =
  39. 39.51 + 37 + 59 + 64 =
  40. 40.65 + 36 + 37 + 48 =

Answer key

  1. 211
  2. 154
  3. 235
  4. 193
  5. 192
  6. 181
  7. 205
  8. 117
  9. 293
  10. 253
  11. 240
  12. 203
  13. 256
  14. 198
  15. 253
  16. 134
  17. 91
  18. 248
  19. 206
  20. 305
  21. 147
  22. 79
  23. 166
  24. 248
  25. 183
  26. 189
  27. 225
  28. 90
  29. 179
  30. 128
  31. 228
  32. 225
  33. 196
  34. 182
  35. 217
  36. 250
  37. 200
  38. 201
  39. 211
  40. 186

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