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Mental Addition Worksheet

Speed calculation lesson 5: Running totals · Set 90 · 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. 1.66 + 18 + 81 + 57 =
  2. 2.87 + 83 + 85 + 14 =
  3. 3.60 + 22 + 40 + 53 =
  4. 4.69 + 14 + 60 + 55 =
  5. 5.35 + 44 + 37 + 18 =
  6. 6.35 + 69 + 58 + 84 =
  7. 7.52 + 57 + 17 + 78 =
  8. 8.73 + 63 + 15 + 18 =
  9. 9.62 + 67 + 67 + 25 =
  10. 10.47 + 29 + 23 + 18 =
  11. 11.14 + 67 + 65 + 26 =
  12. 12.18 + 13 + 18 + 12 =
  13. 13.44 + 31 + 72 + 78 =
  14. 14.70 + 60 + 85 + 15 =
  15. 15.21 + 74 + 83 + 18 =
  16. 16.87 + 77 + 25 + 19 =
  17. 17.18 + 21 + 12 + 48 =
  18. 18.70 + 37 + 85 + 19 =
  19. 19.79 + 74 + 51 + 54 =
  20. 20.65 + 15 + 35 + 33 =
  21. 21.57 + 66 + 41 + 64 =
  22. 22.29 + 48 + 36 + 44 =
  23. 23.53 + 12 + 39 + 17 =
  24. 24.65 + 14 + 32 + 61 =
  25. 25.40 + 82 + 71 + 87 =
  26. 26.15 + 55 + 71 + 18 =
  27. 27.68 + 68 + 43 + 58 =
  28. 28.35 + 55 + 22 + 63 =
  29. 29.30 + 47 + 29 + 12 =
  30. 30.22 + 82 + 61 + 43 =
  31. 31.72 + 37 + 29 + 32 =
  32. 32.12 + 42 + 20 + 79 =
  33. 33.78 + 29 + 64 + 62 =
  34. 34.14 + 71 + 50 + 34 =
  35. 35.69 + 66 + 21 + 42 =
  36. 36.24 + 70 + 35 + 57 =
  37. 37.52 + 24 + 41 + 24 =
  38. 38.73 + 70 + 21 + 14 =
  39. 39.47 + 65 + 47 + 36 =
  40. 40.33 + 70 + 15 + 61 =

Answer key

  1. 222
  2. 269
  3. 175
  4. 198
  5. 134
  6. 246
  7. 204
  8. 169
  9. 221
  10. 117
  11. 172
  12. 61
  13. 225
  14. 230
  15. 196
  16. 208
  17. 99
  18. 211
  19. 258
  20. 148
  21. 228
  22. 157
  23. 121
  24. 172
  25. 280
  26. 159
  27. 237
  28. 175
  29. 118
  30. 208
  31. 170
  32. 153
  33. 233
  34. 169
  35. 198
  36. 186
  37. 141
  38. 178
  39. 195
  40. 179

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