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Mental Addition Worksheet

Speed calculation lesson 5: Running totals · Set 615 · 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. 1.65 + 87 + 60 + 16 =
  2. 2.31 + 24 + 71 + 20 =
  3. 3.72 + 73 + 19 + 36 =
  4. 4.59 + 44 + 57 + 72 =
  5. 5.30 + 84 + 43 + 26 =
  6. 6.63 + 63 + 39 + 30 =
  7. 7.60 + 63 + 52 + 32 =
  8. 8.60 + 35 + 81 + 75 =
  9. 9.33 + 36 + 58 + 16 =
  10. 10.16 + 88 + 19 + 16 =
  11. 11.17 + 66 + 22 + 24 =
  12. 12.31 + 86 + 40 + 36 =
  13. 13.43 + 36 + 28 + 28 =
  14. 14.60 + 26 + 80 + 14 =
  15. 15.15 + 13 + 66 + 89 =
  16. 16.86 + 87 + 41 + 70 =
  17. 17.33 + 47 + 79 + 78 =
  18. 18.30 + 14 + 36 + 32 =
  19. 19.38 + 82 + 44 + 13 =
  20. 20.11 + 67 + 50 + 22 =
  21. 21.80 + 36 + 36 + 58 =
  22. 22.21 + 63 + 65 + 61 =
  23. 23.27 + 72 + 31 + 70 =
  24. 24.50 + 47 + 66 + 13 =
  25. 25.42 + 20 + 72 + 57 =
  26. 26.81 + 59 + 15 + 87 =
  27. 27.70 + 27 + 66 + 86 =
  28. 28.43 + 43 + 75 + 55 =
  29. 29.22 + 39 + 76 + 20 =
  30. 30.59 + 37 + 52 + 54 =
  31. 31.49 + 36 + 36 + 41 =
  32. 32.86 + 44 + 72 + 21 =
  33. 33.18 + 27 + 77 + 79 =
  34. 34.56 + 31 + 41 + 12 =
  35. 35.54 + 13 + 28 + 32 =
  36. 36.61 + 86 + 82 + 53 =
  37. 37.47 + 18 + 75 + 34 =
  38. 38.49 + 52 + 31 + 33 =
  39. 39.51 + 26 + 74 + 22 =
  40. 40.70 + 73 + 81 + 81 =

Answer key

  1. 228
  2. 146
  3. 200
  4. 232
  5. 183
  6. 195
  7. 207
  8. 251
  9. 143
  10. 139
  11. 129
  12. 193
  13. 135
  14. 180
  15. 183
  16. 284
  17. 237
  18. 112
  19. 177
  20. 150
  21. 210
  22. 210
  23. 200
  24. 176
  25. 191
  26. 242
  27. 249
  28. 216
  29. 157
  30. 202
  31. 162
  32. 223
  33. 201
  34. 140
  35. 127
  36. 282
  37. 174
  38. 165
  39. 173
  40. 305

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