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Mental Addition Worksheet

Speed calculation lesson 5: Running totals · Set 141 · 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. 1.24 + 56 + 63 + 27 =
  2. 2.37 + 64 + 12 + 30 =
  3. 3.57 + 46 + 19 + 41 =
  4. 4.16 + 50 + 51 + 33 =
  5. 5.15 + 21 + 73 + 55 =
  6. 6.64 + 17 + 88 + 66 =
  7. 7.82 + 64 + 83 + 58 =
  8. 8.42 + 65 + 81 + 47 =
  9. 9.75 + 11 + 78 + 46 =
  10. 10.14 + 36 + 13 + 17 =
  11. 11.52 + 26 + 19 + 78 =
  12. 12.61 + 74 + 75 + 61 =
  13. 13.52 + 16 + 71 + 61 =
  14. 14.88 + 18 + 74 + 44 =
  15. 15.18 + 32 + 73 + 75 =
  16. 16.48 + 47 + 26 + 25 =
  17. 17.14 + 69 + 25 + 20 =
  18. 18.62 + 28 + 53 + 33 =
  19. 19.73 + 47 + 48 + 50 =
  20. 20.86 + 12 + 25 + 22 =
  21. 21.27 + 43 + 59 + 36 =
  22. 22.46 + 30 + 67 + 53 =
  23. 23.71 + 73 + 21 + 67 =
  24. 24.76 + 13 + 29 + 66 =
  25. 25.88 + 76 + 47 + 17 =
  26. 26.48 + 28 + 15 + 64 =
  27. 27.14 + 30 + 23 + 61 =
  28. 28.24 + 87 + 31 + 24 =
  29. 29.15 + 14 + 35 + 20 =
  30. 30.48 + 74 + 84 + 40 =
  31. 31.20 + 69 + 45 + 79 =
  32. 32.65 + 48 + 76 + 28 =
  33. 33.78 + 31 + 12 + 84 =
  34. 34.72 + 32 + 32 + 23 =
  35. 35.55 + 81 + 87 + 31 =
  36. 36.27 + 29 + 71 + 56 =
  37. 37.87 + 89 + 67 + 44 =
  38. 38.62 + 51 + 57 + 80 =
  39. 39.47 + 77 + 19 + 18 =
  40. 40.22 + 24 + 77 + 22 =

Answer key

  1. 170
  2. 143
  3. 163
  4. 150
  5. 164
  6. 235
  7. 287
  8. 235
  9. 210
  10. 80
  11. 175
  12. 271
  13. 200
  14. 224
  15. 198
  16. 146
  17. 128
  18. 176
  19. 218
  20. 145
  21. 165
  22. 196
  23. 232
  24. 184
  25. 228
  26. 155
  27. 128
  28. 166
  29. 84
  30. 246
  31. 213
  32. 217
  33. 205
  34. 159
  35. 254
  36. 183
  37. 287
  38. 250
  39. 161
  40. 145

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