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Mental Addition Worksheet

Speed calculation lesson 5: Running totals · Set 736 · 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. 1.55 + 45 + 71 + 31 =
  2. 2.84 + 83 + 24 + 31 =
  3. 3.68 + 86 + 71 + 54 =
  4. 4.48 + 29 + 45 + 12 =
  5. 5.78 + 27 + 47 + 59 =
  6. 6.47 + 50 + 87 + 62 =
  7. 7.49 + 19 + 63 + 77 =
  8. 8.24 + 34 + 84 + 12 =
  9. 9.85 + 81 + 11 + 26 =
  10. 10.72 + 67 + 82 + 78 =
  11. 11.44 + 20 + 11 + 55 =
  12. 12.23 + 34 + 35 + 33 =
  13. 13.46 + 22 + 60 + 70 =
  14. 14.14 + 25 + 70 + 51 =
  15. 15.27 + 25 + 31 + 74 =
  16. 16.34 + 50 + 13 + 51 =
  17. 17.66 + 27 + 83 + 58 =
  18. 18.60 + 58 + 68 + 69 =
  19. 19.38 + 51 + 49 + 33 =
  20. 20.25 + 80 + 75 + 65 =
  21. 21.74 + 23 + 46 + 28 =
  22. 22.78 + 56 + 26 + 27 =
  23. 23.29 + 39 + 78 + 36 =
  24. 24.70 + 25 + 17 + 29 =
  25. 25.57 + 49 + 85 + 79 =
  26. 26.88 + 85 + 17 + 71 =
  27. 27.71 + 11 + 71 + 11 =
  28. 28.57 + 16 + 24 + 37 =
  29. 29.63 + 45 + 37 + 40 =
  30. 30.22 + 14 + 70 + 89 =
  31. 31.71 + 17 + 80 + 28 =
  32. 32.28 + 59 + 69 + 62 =
  33. 33.73 + 20 + 18 + 72 =
  34. 34.35 + 65 + 81 + 47 =
  35. 35.52 + 48 + 89 + 70 =
  36. 36.16 + 19 + 59 + 51 =
  37. 37.27 + 19 + 74 + 81 =
  38. 38.82 + 69 + 33 + 57 =
  39. 39.66 + 53 + 40 + 42 =
  40. 40.18 + 24 + 57 + 68 =

Answer key

  1. 202
  2. 222
  3. 279
  4. 134
  5. 211
  6. 246
  7. 208
  8. 154
  9. 203
  10. 299
  11. 130
  12. 125
  13. 198
  14. 160
  15. 157
  16. 148
  17. 234
  18. 255
  19. 171
  20. 245
  21. 171
  22. 187
  23. 182
  24. 141
  25. 270
  26. 261
  27. 164
  28. 134
  29. 185
  30. 195
  31. 196
  32. 218
  33. 183
  34. 228
  35. 259
  36. 145
  37. 201
  38. 241
  39. 201
  40. 167

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