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Mental Addition Worksheet

Speed calculation lesson 5: Running totals · Set 284 · 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. 1.64 + 51 + 11 + 20 =
  2. 2.71 + 87 + 11 + 32 =
  3. 3.48 + 88 + 60 + 43 =
  4. 4.78 + 24 + 13 + 66 =
  5. 5.81 + 14 + 44 + 45 =
  6. 6.72 + 16 + 18 + 16 =
  7. 7.49 + 74 + 63 + 42 =
  8. 8.32 + 29 + 40 + 17 =
  9. 9.50 + 33 + 26 + 70 =
  10. 10.45 + 62 + 79 + 77 =
  11. 11.68 + 64 + 78 + 78 =
  12. 12.57 + 78 + 31 + 49 =
  13. 13.35 + 35 + 80 + 22 =
  14. 14.86 + 25 + 41 + 49 =
  15. 15.26 + 52 + 72 + 28 =
  16. 16.37 + 13 + 58 + 42 =
  17. 17.57 + 83 + 42 + 27 =
  18. 18.37 + 50 + 26 + 42 =
  19. 19.23 + 76 + 77 + 65 =
  20. 20.56 + 16 + 89 + 65 =
  21. 21.74 + 24 + 73 + 73 =
  22. 22.69 + 79 + 21 + 64 =
  23. 23.40 + 64 + 63 + 86 =
  24. 24.44 + 19 + 30 + 22 =
  25. 25.78 + 72 + 24 + 68 =
  26. 26.43 + 42 + 29 + 36 =
  27. 27.71 + 39 + 13 + 62 =
  28. 28.79 + 56 + 18 + 25 =
  29. 29.34 + 67 + 82 + 44 =
  30. 30.14 + 80 + 47 + 81 =
  31. 31.18 + 67 + 72 + 66 =
  32. 32.54 + 25 + 63 + 49 =
  33. 33.15 + 85 + 78 + 75 =
  34. 34.39 + 79 + 46 + 34 =
  35. 35.19 + 35 + 14 + 74 =
  36. 36.44 + 22 + 55 + 31 =
  37. 37.89 + 23 + 20 + 37 =
  38. 38.26 + 11 + 30 + 70 =
  39. 39.33 + 30 + 47 + 19 =
  40. 40.55 + 57 + 45 + 82 =

Answer key

  1. 146
  2. 201
  3. 239
  4. 181
  5. 184
  6. 122
  7. 228
  8. 118
  9. 179
  10. 263
  11. 288
  12. 215
  13. 172
  14. 201
  15. 178
  16. 150
  17. 209
  18. 155
  19. 241
  20. 226
  21. 244
  22. 233
  23. 253
  24. 115
  25. 242
  26. 150
  27. 185
  28. 178
  29. 227
  30. 222
  31. 223
  32. 191
  33. 253
  34. 198
  35. 142
  36. 152
  37. 169
  38. 137
  39. 129
  40. 239

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