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Mental Addition Worksheet

Speed calculation lesson 5: Running totals · Set 149 · 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. 1.14 + 13 + 25 + 35 =
  2. 2.16 + 37 + 36 + 80 =
  3. 3.86 + 82 + 33 + 20 =
  4. 4.59 + 18 + 74 + 63 =
  5. 5.18 + 88 + 41 + 81 =
  6. 6.69 + 14 + 14 + 84 =
  7. 7.66 + 79 + 64 + 16 =
  8. 8.27 + 60 + 23 + 77 =
  9. 9.66 + 18 + 15 + 35 =
  10. 10.13 + 34 + 29 + 87 =
  11. 11.30 + 20 + 66 + 46 =
  12. 12.47 + 45 + 70 + 73 =
  13. 13.73 + 22 + 84 + 81 =
  14. 14.75 + 85 + 67 + 21 =
  15. 15.79 + 64 + 23 + 28 =
  16. 16.39 + 17 + 85 + 84 =
  17. 17.11 + 68 + 38 + 57 =
  18. 18.39 + 59 + 77 + 59 =
  19. 19.52 + 17 + 27 + 26 =
  20. 20.60 + 88 + 53 + 42 =
  21. 21.56 + 11 + 84 + 87 =
  22. 22.69 + 28 + 57 + 65 =
  23. 23.76 + 54 + 15 + 31 =
  24. 24.30 + 18 + 27 + 20 =
  25. 25.19 + 74 + 33 + 19 =
  26. 26.15 + 78 + 38 + 72 =
  27. 27.36 + 14 + 75 + 12 =
  28. 28.17 + 25 + 32 + 77 =
  29. 29.11 + 67 + 48 + 26 =
  30. 30.54 + 84 + 39 + 70 =
  31. 31.52 + 84 + 41 + 32 =
  32. 32.22 + 14 + 11 + 28 =
  33. 33.15 + 48 + 17 + 12 =
  34. 34.80 + 26 + 23 + 19 =
  35. 35.33 + 50 + 11 + 49 =
  36. 36.17 + 70 + 75 + 49 =
  37. 37.88 + 23 + 43 + 19 =
  38. 38.56 + 63 + 34 + 56 =
  39. 39.77 + 74 + 18 + 58 =
  40. 40.28 + 36 + 18 + 19 =

Answer key

  1. 87
  2. 169
  3. 221
  4. 214
  5. 228
  6. 181
  7. 225
  8. 187
  9. 134
  10. 163
  11. 162
  12. 235
  13. 260
  14. 248
  15. 194
  16. 225
  17. 174
  18. 234
  19. 122
  20. 243
  21. 238
  22. 219
  23. 176
  24. 95
  25. 145
  26. 203
  27. 137
  28. 151
  29. 152
  30. 247
  31. 209
  32. 75
  33. 92
  34. 148
  35. 143
  36. 211
  37. 173
  38. 209
  39. 227
  40. 101

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