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Mental Addition Worksheet

Speed calculation lesson 5: Running totals · Set 253 · 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. 1.38 + 73 + 79 + 34 =
  2. 2.29 + 67 + 48 + 39 =
  3. 3.31 + 57 + 65 + 25 =
  4. 4.23 + 28 + 68 + 25 =
  5. 5.84 + 64 + 66 + 51 =
  6. 6.61 + 15 + 66 + 12 =
  7. 7.34 + 40 + 15 + 88 =
  8. 8.67 + 28 + 78 + 36 =
  9. 9.26 + 85 + 22 + 29 =
  10. 10.31 + 82 + 25 + 12 =
  11. 11.59 + 44 + 77 + 63 =
  12. 12.20 + 14 + 26 + 46 =
  13. 13.53 + 64 + 75 + 44 =
  14. 14.56 + 14 + 52 + 37 =
  15. 15.43 + 56 + 73 + 41 =
  16. 16.52 + 54 + 51 + 41 =
  17. 17.79 + 66 + 64 + 37 =
  18. 18.17 + 25 + 11 + 74 =
  19. 19.78 + 24 + 69 + 87 =
  20. 20.45 + 26 + 60 + 27 =
  21. 21.81 + 72 + 54 + 40 =
  22. 22.18 + 53 + 56 + 64 =
  23. 23.56 + 50 + 21 + 38 =
  24. 24.73 + 81 + 14 + 35 =
  25. 25.71 + 42 + 79 + 35 =
  26. 26.48 + 25 + 71 + 46 =
  27. 27.39 + 17 + 43 + 74 =
  28. 28.33 + 54 + 33 + 86 =
  29. 29.84 + 23 + 48 + 73 =
  30. 30.72 + 73 + 11 + 23 =
  31. 31.12 + 75 + 20 + 48 =
  32. 32.61 + 23 + 30 + 18 =
  33. 33.37 + 43 + 59 + 47 =
  34. 34.41 + 27 + 31 + 25 =
  35. 35.59 + 57 + 58 + 14 =
  36. 36.49 + 28 + 11 + 85 =
  37. 37.36 + 18 + 24 + 65 =
  38. 38.17 + 16 + 64 + 15 =
  39. 39.42 + 67 + 57 + 21 =
  40. 40.68 + 60 + 39 + 88 =

Answer key

  1. 224
  2. 183
  3. 178
  4. 144
  5. 265
  6. 154
  7. 177
  8. 209
  9. 162
  10. 150
  11. 243
  12. 106
  13. 236
  14. 159
  15. 213
  16. 198
  17. 246
  18. 127
  19. 258
  20. 158
  21. 247
  22. 191
  23. 165
  24. 203
  25. 227
  26. 190
  27. 173
  28. 206
  29. 228
  30. 179
  31. 155
  32. 132
  33. 186
  34. 124
  35. 188
  36. 173
  37. 143
  38. 112
  39. 187
  40. 255

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