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Mental Addition Worksheet

Speed calculation lesson 5: Running totals · Set 285 · 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. 1.52 + 31 + 88 + 14 =
  2. 2.41 + 19 + 74 + 42 =
  3. 3.61 + 51 + 33 + 24 =
  4. 4.23 + 68 + 84 + 78 =
  5. 5.66 + 40 + 58 + 25 =
  6. 6.47 + 58 + 33 + 83 =
  7. 7.67 + 79 + 19 + 43 =
  8. 8.69 + 33 + 75 + 39 =
  9. 9.56 + 61 + 69 + 44 =
  10. 10.27 + 34 + 57 + 43 =
  11. 11.18 + 54 + 40 + 49 =
  12. 12.58 + 75 + 58 + 48 =
  13. 13.11 + 78 + 75 + 24 =
  14. 14.51 + 85 + 37 + 19 =
  15. 15.73 + 32 + 26 + 84 =
  16. 16.55 + 72 + 14 + 52 =
  17. 17.79 + 44 + 57 + 63 =
  18. 18.27 + 24 + 12 + 43 =
  19. 19.71 + 33 + 22 + 74 =
  20. 20.18 + 82 + 68 + 84 =
  21. 21.33 + 26 + 16 + 26 =
  22. 22.25 + 35 + 15 + 81 =
  23. 23.89 + 35 + 87 + 35 =
  24. 24.28 + 62 + 68 + 61 =
  25. 25.13 + 54 + 89 + 45 =
  26. 26.49 + 28 + 15 + 22 =
  27. 27.55 + 41 + 43 + 50 =
  28. 28.41 + 33 + 21 + 32 =
  29. 29.84 + 78 + 27 + 43 =
  30. 30.29 + 71 + 81 + 18 =
  31. 31.39 + 89 + 23 + 36 =
  32. 32.15 + 53 + 69 + 27 =
  33. 33.50 + 30 + 73 + 84 =
  34. 34.69 + 77 + 63 + 73 =
  35. 35.81 + 66 + 17 + 20 =
  36. 36.21 + 35 + 74 + 18 =
  37. 37.80 + 46 + 13 + 85 =
  38. 38.86 + 47 + 81 + 47 =
  39. 39.53 + 79 + 64 + 39 =
  40. 40.77 + 66 + 78 + 26 =

Answer key

  1. 185
  2. 176
  3. 169
  4. 253
  5. 189
  6. 221
  7. 208
  8. 216
  9. 230
  10. 161
  11. 161
  12. 239
  13. 188
  14. 192
  15. 215
  16. 193
  17. 243
  18. 106
  19. 200
  20. 252
  21. 101
  22. 156
  23. 246
  24. 219
  25. 201
  26. 114
  27. 189
  28. 127
  29. 232
  30. 199
  31. 187
  32. 164
  33. 237
  34. 282
  35. 184
  36. 148
  37. 224
  38. 261
  39. 235
  40. 247

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