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Mental Addition Worksheet

Speed calculation lesson 5: Running totals · Set 375 · 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. 1.84 + 62 + 34 + 44 =
  2. 2.77 + 42 + 79 + 80 =
  3. 3.73 + 14 + 30 + 70 =
  4. 4.80 + 15 + 69 + 52 =
  5. 5.17 + 62 + 44 + 60 =
  6. 6.62 + 37 + 41 + 76 =
  7. 7.74 + 69 + 23 + 69 =
  8. 8.57 + 30 + 29 + 51 =
  9. 9.37 + 16 + 85 + 62 =
  10. 10.16 + 82 + 25 + 49 =
  11. 11.21 + 39 + 42 + 25 =
  12. 12.41 + 11 + 55 + 89 =
  13. 13.18 + 11 + 19 + 83 =
  14. 14.62 + 85 + 56 + 51 =
  15. 15.17 + 48 + 13 + 88 =
  16. 16.50 + 66 + 52 + 11 =
  17. 17.85 + 57 + 65 + 86 =
  18. 18.62 + 73 + 81 + 64 =
  19. 19.29 + 12 + 21 + 57 =
  20. 20.74 + 39 + 41 + 88 =
  21. 21.71 + 33 + 51 + 75 =
  22. 22.17 + 39 + 21 + 15 =
  23. 23.79 + 28 + 64 + 51 =
  24. 24.55 + 61 + 52 + 41 =
  25. 25.21 + 31 + 61 + 17 =
  26. 26.73 + 84 + 14 + 55 =
  27. 27.77 + 31 + 28 + 16 =
  28. 28.28 + 36 + 29 + 28 =
  29. 29.36 + 58 + 83 + 16 =
  30. 30.66 + 11 + 83 + 33 =
  31. 31.60 + 74 + 49 + 89 =
  32. 32.15 + 36 + 88 + 42 =
  33. 33.89 + 22 + 52 + 65 =
  34. 34.66 + 42 + 70 + 11 =
  35. 35.29 + 23 + 11 + 45 =
  36. 36.12 + 80 + 17 + 29 =
  37. 37.67 + 82 + 86 + 88 =
  38. 38.44 + 89 + 39 + 42 =
  39. 39.58 + 37 + 20 + 18 =
  40. 40.62 + 49 + 21 + 79 =

Answer key

  1. 224
  2. 278
  3. 187
  4. 216
  5. 183
  6. 216
  7. 235
  8. 167
  9. 200
  10. 172
  11. 127
  12. 196
  13. 131
  14. 254
  15. 166
  16. 179
  17. 293
  18. 280
  19. 119
  20. 242
  21. 230
  22. 92
  23. 222
  24. 209
  25. 130
  26. 226
  27. 152
  28. 121
  29. 193
  30. 193
  31. 272
  32. 181
  33. 228
  34. 189
  35. 108
  36. 138
  37. 323
  38. 214
  39. 133
  40. 211

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