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Mental Addition Worksheet

Speed calculation lesson 5: Running totals · Set 605 · 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. 1.51 + 52 + 75 + 18 =
  2. 2.72 + 28 + 29 + 40 =
  3. 3.14 + 28 + 64 + 64 =
  4. 4.26 + 60 + 82 + 88 =
  5. 5.38 + 77 + 82 + 45 =
  6. 6.20 + 74 + 71 + 23 =
  7. 7.70 + 30 + 82 + 38 =
  8. 8.20 + 48 + 13 + 70 =
  9. 9.68 + 54 + 35 + 71 =
  10. 10.81 + 84 + 25 + 67 =
  11. 11.74 + 12 + 88 + 87 =
  12. 12.37 + 42 + 39 + 56 =
  13. 13.23 + 55 + 80 + 50 =
  14. 14.43 + 77 + 30 + 61 =
  15. 15.82 + 24 + 74 + 14 =
  16. 16.41 + 66 + 50 + 34 =
  17. 17.43 + 43 + 63 + 57 =
  18. 18.20 + 30 + 12 + 62 =
  19. 19.22 + 50 + 46 + 65 =
  20. 20.32 + 70 + 77 + 66 =
  21. 21.53 + 27 + 70 + 64 =
  22. 22.12 + 81 + 24 + 44 =
  23. 23.46 + 68 + 43 + 67 =
  24. 24.36 + 76 + 45 + 24 =
  25. 25.53 + 72 + 69 + 34 =
  26. 26.44 + 88 + 22 + 66 =
  27. 27.42 + 58 + 31 + 25 =
  28. 28.44 + 40 + 54 + 61 =
  29. 29.34 + 68 + 73 + 60 =
  30. 30.78 + 81 + 13 + 18 =
  31. 31.78 + 84 + 18 + 32 =
  32. 32.21 + 74 + 66 + 37 =
  33. 33.29 + 43 + 30 + 82 =
  34. 34.70 + 53 + 19 + 62 =
  35. 35.61 + 35 + 81 + 79 =
  36. 36.72 + 13 + 77 + 20 =
  37. 37.68 + 70 + 14 + 68 =
  38. 38.32 + 12 + 75 + 12 =
  39. 39.29 + 43 + 77 + 49 =
  40. 40.19 + 51 + 45 + 63 =

Answer key

  1. 196
  2. 169
  3. 170
  4. 256
  5. 242
  6. 188
  7. 220
  8. 151
  9. 228
  10. 257
  11. 261
  12. 174
  13. 208
  14. 211
  15. 194
  16. 191
  17. 206
  18. 124
  19. 183
  20. 245
  21. 214
  22. 161
  23. 224
  24. 181
  25. 228
  26. 220
  27. 156
  28. 199
  29. 235
  30. 190
  31. 212
  32. 198
  33. 184
  34. 204
  35. 256
  36. 182
  37. 220
  38. 131
  39. 198
  40. 178

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