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Mental Addition Worksheet

Speed calculation lesson 5: Running totals · Set 305 · 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. 1.32 + 29 + 33 + 66 =
  2. 2.63 + 34 + 64 + 32 =
  3. 3.14 + 65 + 64 + 16 =
  4. 4.42 + 30 + 23 + 49 =
  5. 5.28 + 88 + 81 + 65 =
  6. 6.64 + 32 + 71 + 12 =
  7. 7.84 + 52 + 17 + 55 =
  8. 8.33 + 30 + 76 + 72 =
  9. 9.20 + 49 + 35 + 21 =
  10. 10.26 + 48 + 51 + 50 =
  11. 11.27 + 47 + 89 + 86 =
  12. 12.53 + 56 + 44 + 48 =
  13. 13.61 + 24 + 14 + 38 =
  14. 14.45 + 20 + 68 + 48 =
  15. 15.39 + 39 + 13 + 51 =
  16. 16.11 + 27 + 11 + 23 =
  17. 17.44 + 41 + 58 + 79 =
  18. 18.56 + 57 + 45 + 37 =
  19. 19.59 + 46 + 85 + 73 =
  20. 20.40 + 38 + 60 + 44 =
  21. 21.71 + 89 + 69 + 15 =
  22. 22.65 + 70 + 53 + 36 =
  23. 23.22 + 62 + 88 + 83 =
  24. 24.54 + 60 + 42 + 78 =
  25. 25.22 + 15 + 73 + 64 =
  26. 26.82 + 89 + 34 + 40 =
  27. 27.24 + 59 + 14 + 80 =
  28. 28.74 + 81 + 53 + 26 =
  29. 29.88 + 13 + 81 + 79 =
  30. 30.59 + 81 + 53 + 54 =
  31. 31.20 + 14 + 24 + 39 =
  32. 32.53 + 73 + 74 + 22 =
  33. 33.12 + 72 + 26 + 72 =
  34. 34.52 + 85 + 48 + 14 =
  35. 35.16 + 81 + 36 + 80 =
  36. 36.84 + 53 + 79 + 12 =
  37. 37.44 + 25 + 12 + 54 =
  38. 38.16 + 45 + 53 + 22 =
  39. 39.30 + 45 + 89 + 12 =
  40. 40.44 + 32 + 27 + 20 =

Answer key

  1. 160
  2. 193
  3. 159
  4. 144
  5. 262
  6. 179
  7. 208
  8. 211
  9. 125
  10. 175
  11. 249
  12. 201
  13. 137
  14. 181
  15. 142
  16. 72
  17. 222
  18. 195
  19. 263
  20. 182
  21. 244
  22. 224
  23. 255
  24. 234
  25. 174
  26. 245
  27. 177
  28. 234
  29. 261
  30. 247
  31. 97
  32. 222
  33. 182
  34. 199
  35. 213
  36. 228
  37. 135
  38. 136
  39. 176
  40. 123

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