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Mental Addition Worksheet

Speed calculation lesson 5: Running totals · Set 248 · 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. 1.11 + 63 + 24 + 61 =
  2. 2.84 + 38 + 75 + 24 =
  3. 3.82 + 59 + 18 + 63 =
  4. 4.23 + 34 + 21 + 63 =
  5. 5.15 + 37 + 14 + 55 =
  6. 6.30 + 29 + 20 + 69 =
  7. 7.55 + 33 + 28 + 47 =
  8. 8.20 + 75 + 67 + 48 =
  9. 9.79 + 68 + 57 + 80 =
  10. 10.62 + 33 + 11 + 31 =
  11. 11.67 + 70 + 36 + 14 =
  12. 12.29 + 42 + 55 + 49 =
  13. 13.15 + 71 + 11 + 66 =
  14. 14.72 + 14 + 28 + 50 =
  15. 15.43 + 48 + 77 + 45 =
  16. 16.78 + 68 + 15 + 76 =
  17. 17.57 + 37 + 31 + 17 =
  18. 18.44 + 87 + 58 + 30 =
  19. 19.74 + 26 + 57 + 25 =
  20. 20.38 + 11 + 59 + 21 =
  21. 21.57 + 63 + 39 + 34 =
  22. 22.17 + 87 + 48 + 81 =
  23. 23.12 + 34 + 62 + 64 =
  24. 24.19 + 66 + 23 + 46 =
  25. 25.82 + 84 + 29 + 18 =
  26. 26.78 + 33 + 81 + 14 =
  27. 27.78 + 37 + 63 + 44 =
  28. 28.60 + 27 + 21 + 64 =
  29. 29.14 + 61 + 21 + 29 =
  30. 30.58 + 17 + 34 + 23 =
  31. 31.51 + 75 + 23 + 65 =
  32. 32.19 + 62 + 83 + 79 =
  33. 33.16 + 35 + 17 + 86 =
  34. 34.35 + 29 + 32 + 73 =
  35. 35.69 + 89 + 34 + 52 =
  36. 36.17 + 82 + 71 + 14 =
  37. 37.13 + 69 + 84 + 81 =
  38. 38.84 + 13 + 80 + 14 =
  39. 39.44 + 44 + 79 + 33 =
  40. 40.40 + 86 + 28 + 43 =

Answer key

  1. 159
  2. 221
  3. 222
  4. 141
  5. 121
  6. 148
  7. 163
  8. 210
  9. 284
  10. 137
  11. 187
  12. 175
  13. 163
  14. 164
  15. 213
  16. 237
  17. 142
  18. 219
  19. 182
  20. 129
  21. 193
  22. 233
  23. 172
  24. 154
  25. 213
  26. 206
  27. 222
  28. 172
  29. 125
  30. 132
  31. 214
  32. 243
  33. 154
  34. 169
  35. 244
  36. 184
  37. 247
  38. 191
  39. 200
  40. 197

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