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Mental Addition Worksheet

Speed calculation lesson 5: Running totals · Set 803 · 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. 1.21 + 21 + 77 + 25 =
  2. 2.59 + 79 + 81 + 49 =
  3. 3.72 + 74 + 28 + 74 =
  4. 4.85 + 58 + 11 + 88 =
  5. 5.53 + 67 + 53 + 13 =
  6. 6.28 + 60 + 73 + 74 =
  7. 7.15 + 60 + 48 + 84 =
  8. 8.78 + 42 + 67 + 83 =
  9. 9.82 + 39 + 64 + 62 =
  10. 10.66 + 48 + 16 + 22 =
  11. 11.82 + 17 + 27 + 49 =
  12. 12.49 + 57 + 44 + 74 =
  13. 13.18 + 72 + 52 + 35 =
  14. 14.33 + 70 + 67 + 50 =
  15. 15.72 + 28 + 88 + 46 =
  16. 16.14 + 87 + 76 + 32 =
  17. 17.75 + 61 + 45 + 22 =
  18. 18.75 + 27 + 31 + 56 =
  19. 19.51 + 11 + 67 + 39 =
  20. 20.60 + 75 + 26 + 43 =
  21. 21.59 + 57 + 53 + 62 =
  22. 22.67 + 49 + 50 + 56 =
  23. 23.79 + 80 + 11 + 58 =
  24. 24.65 + 29 + 60 + 65 =
  25. 25.21 + 57 + 73 + 24 =
  26. 26.80 + 67 + 28 + 32 =
  27. 27.76 + 22 + 36 + 67 =
  28. 28.51 + 40 + 74 + 28 =
  29. 29.86 + 85 + 22 + 26 =
  30. 30.64 + 80 + 12 + 32 =
  31. 31.88 + 56 + 82 + 73 =
  32. 32.83 + 18 + 37 + 18 =
  33. 33.37 + 19 + 82 + 16 =
  34. 34.58 + 57 + 58 + 65 =
  35. 35.17 + 71 + 89 + 85 =
  36. 36.22 + 49 + 23 + 34 =
  37. 37.39 + 38 + 22 + 75 =
  38. 38.64 + 21 + 13 + 64 =
  39. 39.41 + 50 + 61 + 42 =
  40. 40.21 + 22 + 70 + 16 =

Answer key

  1. 144
  2. 268
  3. 248
  4. 242
  5. 186
  6. 235
  7. 207
  8. 270
  9. 247
  10. 152
  11. 175
  12. 224
  13. 177
  14. 220
  15. 234
  16. 209
  17. 203
  18. 189
  19. 168
  20. 204
  21. 231
  22. 222
  23. 228
  24. 219
  25. 175
  26. 207
  27. 201
  28. 193
  29. 219
  30. 188
  31. 299
  32. 156
  33. 154
  34. 238
  35. 262
  36. 128
  37. 174
  38. 162
  39. 194
  40. 129

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