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Mental Addition Worksheet

Speed calculation lesson 5: Running totals · Set 689 · 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. 1.78 + 33 + 21 + 65 =
  2. 2.65 + 62 + 24 + 22 =
  3. 3.52 + 33 + 74 + 75 =
  4. 4.13 + 61 + 60 + 24 =
  5. 5.16 + 57 + 73 + 33 =
  6. 6.76 + 14 + 50 + 30 =
  7. 7.48 + 57 + 21 + 89 =
  8. 8.11 + 21 + 46 + 48 =
  9. 9.39 + 69 + 13 + 48 =
  10. 10.89 + 40 + 71 + 24 =
  11. 11.51 + 58 + 33 + 19 =
  12. 12.27 + 87 + 48 + 86 =
  13. 13.48 + 87 + 50 + 42 =
  14. 14.34 + 57 + 38 + 62 =
  15. 15.23 + 42 + 59 + 79 =
  16. 16.25 + 54 + 27 + 24 =
  17. 17.66 + 42 + 48 + 67 =
  18. 18.23 + 85 + 14 + 31 =
  19. 19.64 + 88 + 81 + 60 =
  20. 20.45 + 71 + 88 + 89 =
  21. 21.87 + 30 + 44 + 39 =
  22. 22.62 + 73 + 44 + 59 =
  23. 23.76 + 54 + 61 + 72 =
  24. 24.30 + 69 + 42 + 60 =
  25. 25.80 + 76 + 29 + 84 =
  26. 26.49 + 86 + 41 + 52 =
  27. 27.52 + 31 + 52 + 11 =
  28. 28.73 + 52 + 81 + 40 =
  29. 29.55 + 50 + 63 + 35 =
  30. 30.82 + 21 + 78 + 65 =
  31. 31.67 + 14 + 28 + 71 =
  32. 32.74 + 30 + 56 + 74 =
  33. 33.17 + 67 + 40 + 89 =
  34. 34.45 + 54 + 68 + 53 =
  35. 35.88 + 32 + 57 + 21 =
  36. 36.27 + 15 + 71 + 21 =
  37. 37.74 + 30 + 47 + 37 =
  38. 38.83 + 49 + 84 + 26 =
  39. 39.30 + 73 + 22 + 34 =
  40. 40.33 + 71 + 35 + 27 =

Answer key

  1. 197
  2. 173
  3. 234
  4. 158
  5. 179
  6. 170
  7. 215
  8. 126
  9. 169
  10. 224
  11. 161
  12. 248
  13. 227
  14. 191
  15. 203
  16. 130
  17. 223
  18. 153
  19. 293
  20. 293
  21. 200
  22. 238
  23. 263
  24. 201
  25. 269
  26. 228
  27. 146
  28. 246
  29. 203
  30. 246
  31. 180
  32. 234
  33. 213
  34. 220
  35. 198
  36. 134
  37. 188
  38. 242
  39. 159
  40. 166

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