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Mental Addition Worksheet

Speed calculation lesson 5: Running totals · Set 607 · 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. 1.50 + 57 + 70 + 25 =
  2. 2.72 + 71 + 47 + 70 =
  3. 3.40 + 78 + 45 + 20 =
  4. 4.55 + 12 + 32 + 70 =
  5. 5.60 + 31 + 28 + 15 =
  6. 6.32 + 21 + 40 + 17 =
  7. 7.46 + 23 + 72 + 63 =
  8. 8.80 + 73 + 25 + 69 =
  9. 9.22 + 59 + 79 + 41 =
  10. 10.74 + 74 + 82 + 27 =
  11. 11.77 + 46 + 41 + 43 =
  12. 12.83 + 56 + 26 + 54 =
  13. 13.77 + 25 + 77 + 17 =
  14. 14.74 + 26 + 55 + 39 =
  15. 15.58 + 78 + 26 + 22 =
  16. 16.84 + 28 + 11 + 22 =
  17. 17.39 + 86 + 24 + 33 =
  18. 18.77 + 15 + 55 + 31 =
  19. 19.64 + 53 + 65 + 30 =
  20. 20.43 + 23 + 26 + 13 =
  21. 21.12 + 29 + 16 + 85 =
  22. 22.88 + 53 + 17 + 79 =
  23. 23.71 + 39 + 34 + 12 =
  24. 24.26 + 87 + 69 + 35 =
  25. 25.45 + 43 + 26 + 60 =
  26. 26.14 + 57 + 43 + 29 =
  27. 27.26 + 20 + 83 + 16 =
  28. 28.40 + 21 + 32 + 89 =
  29. 29.26 + 69 + 36 + 89 =
  30. 30.56 + 26 + 85 + 63 =
  31. 31.85 + 47 + 67 + 27 =
  32. 32.89 + 12 + 82 + 68 =
  33. 33.22 + 60 + 21 + 78 =
  34. 34.29 + 52 + 71 + 36 =
  35. 35.71 + 19 + 25 + 44 =
  36. 36.45 + 34 + 41 + 37 =
  37. 37.68 + 58 + 49 + 64 =
  38. 38.31 + 34 + 37 + 51 =
  39. 39.66 + 71 + 47 + 33 =
  40. 40.17 + 80 + 40 + 28 =

Answer key

  1. 202
  2. 260
  3. 183
  4. 169
  5. 134
  6. 110
  7. 204
  8. 247
  9. 201
  10. 257
  11. 207
  12. 219
  13. 196
  14. 194
  15. 184
  16. 145
  17. 182
  18. 178
  19. 212
  20. 105
  21. 142
  22. 237
  23. 156
  24. 217
  25. 174
  26. 143
  27. 145
  28. 182
  29. 220
  30. 230
  31. 226
  32. 251
  33. 181
  34. 188
  35. 159
  36. 157
  37. 239
  38. 153
  39. 217
  40. 165

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