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Mental Addition Worksheet

Speed calculation lesson 5: Running totals · Set 92 · 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 + 58 + 56 + 86 =
  2. 2.14 + 39 + 84 + 87 =
  3. 3.34 + 19 + 64 + 51 =
  4. 4.30 + 28 + 54 + 61 =
  5. 5.78 + 84 + 79 + 43 =
  6. 6.67 + 50 + 14 + 18 =
  7. 7.63 + 63 + 46 + 69 =
  8. 8.73 + 13 + 34 + 73 =
  9. 9.64 + 30 + 42 + 72 =
  10. 10.83 + 61 + 59 + 83 =
  11. 11.84 + 69 + 29 + 70 =
  12. 12.62 + 43 + 80 + 39 =
  13. 13.49 + 46 + 85 + 66 =
  14. 14.26 + 12 + 73 + 79 =
  15. 15.25 + 65 + 20 + 73 =
  16. 16.35 + 18 + 79 + 44 =
  17. 17.40 + 40 + 45 + 80 =
  18. 18.59 + 39 + 77 + 68 =
  19. 19.66 + 41 + 43 + 34 =
  20. 20.60 + 79 + 82 + 54 =
  21. 21.30 + 46 + 57 + 46 =
  22. 22.80 + 37 + 61 + 76 =
  23. 23.59 + 66 + 11 + 18 =
  24. 24.50 + 47 + 64 + 34 =
  25. 25.45 + 49 + 56 + 12 =
  26. 26.66 + 28 + 36 + 51 =
  27. 27.15 + 33 + 76 + 46 =
  28. 28.37 + 44 + 24 + 19 =
  29. 29.23 + 73 + 30 + 12 =
  30. 30.64 + 17 + 14 + 12 =
  31. 31.88 + 64 + 48 + 70 =
  32. 32.38 + 12 + 36 + 34 =
  33. 33.64 + 13 + 89 + 54 =
  34. 34.31 + 12 + 66 + 63 =
  35. 35.75 + 32 + 33 + 64 =
  36. 36.77 + 82 + 49 + 34 =
  37. 37.71 + 38 + 41 + 66 =
  38. 38.48 + 22 + 82 + 74 =
  39. 39.40 + 78 + 43 + 55 =
  40. 40.16 + 80 + 78 + 81 =

Answer key

  1. 251
  2. 224
  3. 168
  4. 173
  5. 284
  6. 149
  7. 241
  8. 193
  9. 208
  10. 286
  11. 252
  12. 224
  13. 246
  14. 190
  15. 183
  16. 176
  17. 205
  18. 243
  19. 184
  20. 275
  21. 179
  22. 254
  23. 154
  24. 195
  25. 162
  26. 181
  27. 170
  28. 124
  29. 138
  30. 107
  31. 270
  32. 120
  33. 220
  34. 172
  35. 204
  36. 242
  37. 216
  38. 226
  39. 216
  40. 255

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