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Mental Addition Worksheet

Speed calculation lesson 5: Running totals · Set 330 · 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 + 17 + 36 + 27 =
  2. 2.33 + 66 + 65 + 70 =
  3. 3.29 + 80 + 41 + 30 =
  4. 4.36 + 20 + 11 + 53 =
  5. 5.30 + 61 + 37 + 77 =
  6. 6.75 + 81 + 53 + 42 =
  7. 7.76 + 39 + 51 + 61 =
  8. 8.13 + 83 + 33 + 43 =
  9. 9.55 + 60 + 51 + 78 =
  10. 10.79 + 68 + 14 + 34 =
  11. 11.60 + 35 + 23 + 14 =
  12. 12.81 + 79 + 88 + 63 =
  13. 13.17 + 29 + 43 + 50 =
  14. 14.28 + 16 + 74 + 17 =
  15. 15.32 + 34 + 78 + 13 =
  16. 16.33 + 44 + 37 + 74 =
  17. 17.52 + 75 + 31 + 64 =
  18. 18.20 + 24 + 50 + 68 =
  19. 19.18 + 24 + 22 + 60 =
  20. 20.75 + 30 + 26 + 55 =
  21. 21.18 + 53 + 31 + 42 =
  22. 22.52 + 32 + 28 + 31 =
  23. 23.38 + 85 + 72 + 48 =
  24. 24.73 + 88 + 53 + 15 =
  25. 25.32 + 87 + 39 + 62 =
  26. 26.20 + 64 + 80 + 71 =
  27. 27.61 + 68 + 52 + 41 =
  28. 28.86 + 87 + 64 + 66 =
  29. 29.22 + 30 + 28 + 45 =
  30. 30.50 + 62 + 46 + 16 =
  31. 31.24 + 83 + 39 + 33 =
  32. 32.18 + 82 + 33 + 19 =
  33. 33.71 + 84 + 49 + 42 =
  34. 34.38 + 88 + 67 + 85 =
  35. 35.56 + 71 + 56 + 62 =
  36. 36.21 + 34 + 56 + 79 =
  37. 37.79 + 79 + 32 + 47 =
  38. 38.82 + 51 + 38 + 53 =
  39. 39.66 + 80 + 64 + 32 =
  40. 40.23 + 81 + 16 + 49 =

Answer key

  1. 115
  2. 234
  3. 180
  4. 120
  5. 205
  6. 251
  7. 227
  8. 172
  9. 244
  10. 195
  11. 132
  12. 311
  13. 139
  14. 135
  15. 157
  16. 188
  17. 222
  18. 162
  19. 124
  20. 186
  21. 144
  22. 143
  23. 243
  24. 229
  25. 220
  26. 235
  27. 222
  28. 303
  29. 125
  30. 174
  31. 179
  32. 152
  33. 246
  34. 278
  35. 245
  36. 190
  37. 237
  38. 224
  39. 242
  40. 169

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