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Mental Addition Worksheet

Speed calculation lesson 5: Running totals · Set 817 · 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. 1.22 + 18 + 56 + 71 =
  2. 2.52 + 85 + 45 + 46 =
  3. 3.67 + 13 + 48 + 18 =
  4. 4.30 + 16 + 56 + 74 =
  5. 5.68 + 89 + 12 + 89 =
  6. 6.29 + 32 + 69 + 65 =
  7. 7.48 + 54 + 64 + 19 =
  8. 8.15 + 51 + 72 + 17 =
  9. 9.14 + 35 + 17 + 51 =
  10. 10.34 + 19 + 35 + 13 =
  11. 11.26 + 17 + 18 + 65 =
  12. 12.27 + 57 + 43 + 44 =
  13. 13.18 + 75 + 43 + 25 =
  14. 14.38 + 33 + 36 + 32 =
  15. 15.58 + 18 + 52 + 63 =
  16. 16.62 + 66 + 76 + 31 =
  17. 17.67 + 67 + 45 + 78 =
  18. 18.20 + 77 + 72 + 60 =
  19. 19.21 + 16 + 69 + 55 =
  20. 20.68 + 71 + 71 + 65 =
  21. 21.45 + 19 + 24 + 71 =
  22. 22.65 + 23 + 19 + 36 =
  23. 23.37 + 85 + 77 + 61 =
  24. 24.71 + 64 + 20 + 27 =
  25. 25.21 + 33 + 63 + 39 =
  26. 26.88 + 46 + 24 + 25 =
  27. 27.43 + 89 + 49 + 84 =
  28. 28.48 + 85 + 38 + 71 =
  29. 29.11 + 27 + 23 + 55 =
  30. 30.85 + 49 + 37 + 23 =
  31. 31.69 + 69 + 88 + 34 =
  32. 32.39 + 89 + 25 + 60 =
  33. 33.74 + 42 + 51 + 67 =
  34. 34.32 + 72 + 86 + 48 =
  35. 35.26 + 30 + 75 + 73 =
  36. 36.61 + 76 + 72 + 89 =
  37. 37.24 + 63 + 66 + 54 =
  38. 38.45 + 75 + 38 + 47 =
  39. 39.45 + 72 + 25 + 59 =
  40. 40.76 + 61 + 43 + 19 =

Answer key

  1. 167
  2. 228
  3. 146
  4. 176
  5. 258
  6. 195
  7. 185
  8. 155
  9. 117
  10. 101
  11. 126
  12. 171
  13. 161
  14. 139
  15. 191
  16. 235
  17. 257
  18. 229
  19. 161
  20. 275
  21. 159
  22. 143
  23. 260
  24. 182
  25. 156
  26. 183
  27. 265
  28. 242
  29. 116
  30. 194
  31. 260
  32. 213
  33. 234
  34. 238
  35. 204
  36. 298
  37. 207
  38. 205
  39. 201
  40. 199

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