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Mental Addition Worksheet

Speed calculation lesson 5: Running totals · Set 637 · 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. 1.35 + 16 + 69 + 60 =
  2. 2.19 + 89 + 32 + 13 =
  3. 3.29 + 52 + 23 + 61 =
  4. 4.53 + 51 + 55 + 21 =
  5. 5.78 + 67 + 28 + 44 =
  6. 6.81 + 67 + 28 + 73 =
  7. 7.14 + 29 + 66 + 41 =
  8. 8.20 + 36 + 68 + 54 =
  9. 9.78 + 49 + 71 + 23 =
  10. 10.13 + 68 + 12 + 24 =
  11. 11.29 + 87 + 20 + 28 =
  12. 12.58 + 51 + 76 + 37 =
  13. 13.27 + 44 + 78 + 20 =
  14. 14.68 + 27 + 87 + 24 =
  15. 15.13 + 17 + 58 + 30 =
  16. 16.49 + 24 + 30 + 17 =
  17. 17.67 + 16 + 57 + 39 =
  18. 18.89 + 54 + 47 + 63 =
  19. 19.49 + 81 + 53 + 78 =
  20. 20.88 + 26 + 23 + 59 =
  21. 21.18 + 52 + 40 + 79 =
  22. 22.21 + 62 + 42 + 78 =
  23. 23.72 + 51 + 49 + 82 =
  24. 24.65 + 51 + 38 + 15 =
  25. 25.51 + 71 + 71 + 19 =
  26. 26.20 + 67 + 29 + 20 =
  27. 27.62 + 16 + 29 + 59 =
  28. 28.47 + 57 + 32 + 61 =
  29. 29.31 + 37 + 85 + 73 =
  30. 30.71 + 12 + 85 + 64 =
  31. 31.68 + 22 + 74 + 36 =
  32. 32.28 + 82 + 28 + 73 =
  33. 33.35 + 16 + 33 + 33 =
  34. 34.28 + 69 + 35 + 61 =
  35. 35.50 + 40 + 47 + 19 =
  36. 36.51 + 46 + 72 + 85 =
  37. 37.25 + 30 + 65 + 39 =
  38. 38.63 + 58 + 83 + 72 =
  39. 39.64 + 79 + 41 + 16 =
  40. 40.14 + 62 + 35 + 46 =

Answer key

  1. 180
  2. 153
  3. 165
  4. 180
  5. 217
  6. 249
  7. 150
  8. 178
  9. 221
  10. 117
  11. 164
  12. 222
  13. 169
  14. 206
  15. 118
  16. 120
  17. 179
  18. 253
  19. 261
  20. 196
  21. 189
  22. 203
  23. 254
  24. 169
  25. 212
  26. 136
  27. 166
  28. 197
  29. 226
  30. 232
  31. 200
  32. 211
  33. 117
  34. 193
  35. 156
  36. 254
  37. 159
  38. 276
  39. 200
  40. 157

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