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Mental Addition Worksheet

Speed calculation lesson 5: Running totals · Set 239 · 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. 1.79 + 40 + 23 + 22 =
  2. 2.21 + 25 + 63 + 34 =
  3. 3.26 + 16 + 25 + 67 =
  4. 4.80 + 48 + 11 + 48 =
  5. 5.72 + 56 + 39 + 40 =
  6. 6.84 + 14 + 27 + 78 =
  7. 7.75 + 69 + 64 + 28 =
  8. 8.28 + 44 + 71 + 54 =
  9. 9.25 + 51 + 70 + 17 =
  10. 10.31 + 72 + 53 + 81 =
  11. 11.45 + 23 + 19 + 86 =
  12. 12.65 + 39 + 76 + 41 =
  13. 13.57 + 35 + 27 + 55 =
  14. 14.22 + 86 + 87 + 77 =
  15. 15.11 + 85 + 15 + 43 =
  16. 16.12 + 49 + 17 + 46 =
  17. 17.83 + 56 + 84 + 44 =
  18. 18.58 + 33 + 82 + 47 =
  19. 19.16 + 29 + 19 + 11 =
  20. 20.16 + 34 + 42 + 22 =
  21. 21.14 + 19 + 41 + 88 =
  22. 22.73 + 25 + 47 + 84 =
  23. 23.85 + 40 + 65 + 55 =
  24. 24.63 + 26 + 23 + 81 =
  25. 25.65 + 14 + 50 + 64 =
  26. 26.31 + 23 + 42 + 40 =
  27. 27.12 + 83 + 12 + 54 =
  28. 28.31 + 79 + 19 + 73 =
  29. 29.30 + 23 + 59 + 72 =
  30. 30.16 + 87 + 41 + 84 =
  31. 31.73 + 80 + 26 + 89 =
  32. 32.40 + 79 + 11 + 41 =
  33. 33.45 + 55 + 31 + 50 =
  34. 34.77 + 71 + 32 + 63 =
  35. 35.25 + 81 + 86 + 36 =
  36. 36.58 + 30 + 16 + 36 =
  37. 37.34 + 43 + 36 + 43 =
  38. 38.37 + 52 + 77 + 19 =
  39. 39.58 + 54 + 59 + 64 =
  40. 40.87 + 80 + 76 + 45 =

Answer key

  1. 164
  2. 143
  3. 134
  4. 187
  5. 207
  6. 203
  7. 236
  8. 197
  9. 163
  10. 237
  11. 173
  12. 221
  13. 174
  14. 272
  15. 154
  16. 124
  17. 267
  18. 220
  19. 75
  20. 114
  21. 162
  22. 229
  23. 245
  24. 193
  25. 193
  26. 136
  27. 161
  28. 202
  29. 184
  30. 228
  31. 268
  32. 171
  33. 181
  34. 243
  35. 228
  36. 140
  37. 156
  38. 185
  39. 235
  40. 288

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