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Mental Addition Worksheet

Speed calculation lesson 5: Running totals · Set 89 · 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. 1.66 + 65 + 37 + 60 =
  2. 2.89 + 14 + 62 + 14 =
  3. 3.78 + 23 + 83 + 30 =
  4. 4.13 + 74 + 75 + 76 =
  5. 5.16 + 56 + 50 + 66 =
  6. 6.62 + 84 + 86 + 14 =
  7. 7.26 + 66 + 62 + 25 =
  8. 8.23 + 66 + 76 + 57 =
  9. 9.75 + 48 + 42 + 67 =
  10. 10.13 + 66 + 14 + 87 =
  11. 11.22 + 45 + 31 + 24 =
  12. 12.33 + 66 + 85 + 20 =
  13. 13.84 + 66 + 71 + 51 =
  14. 14.65 + 27 + 11 + 35 =
  15. 15.22 + 32 + 73 + 81 =
  16. 16.79 + 64 + 17 + 20 =
  17. 17.33 + 81 + 33 + 25 =
  18. 18.37 + 48 + 31 + 63 =
  19. 19.77 + 39 + 17 + 87 =
  20. 20.63 + 19 + 64 + 76 =
  21. 21.51 + 58 + 60 + 64 =
  22. 22.44 + 45 + 61 + 31 =
  23. 23.25 + 62 + 55 + 40 =
  24. 24.52 + 27 + 47 + 32 =
  25. 25.26 + 82 + 18 + 63 =
  26. 26.49 + 34 + 52 + 22 =
  27. 27.46 + 61 + 29 + 66 =
  28. 28.34 + 40 + 11 + 50 =
  29. 29.28 + 78 + 62 + 61 =
  30. 30.55 + 48 + 85 + 72 =
  31. 31.77 + 64 + 35 + 57 =
  32. 32.67 + 29 + 45 + 57 =
  33. 33.18 + 15 + 49 + 61 =
  34. 34.54 + 52 + 12 + 52 =
  35. 35.16 + 13 + 58 + 79 =
  36. 36.67 + 15 + 36 + 42 =
  37. 37.21 + 54 + 59 + 77 =
  38. 38.66 + 12 + 75 + 39 =
  39. 39.34 + 60 + 40 + 60 =
  40. 40.70 + 89 + 32 + 25 =

Answer key

  1. 228
  2. 179
  3. 214
  4. 238
  5. 188
  6. 246
  7. 179
  8. 222
  9. 232
  10. 180
  11. 122
  12. 204
  13. 272
  14. 138
  15. 208
  16. 180
  17. 172
  18. 179
  19. 220
  20. 222
  21. 233
  22. 181
  23. 182
  24. 158
  25. 189
  26. 157
  27. 202
  28. 135
  29. 229
  30. 260
  31. 233
  32. 198
  33. 143
  34. 170
  35. 166
  36. 160
  37. 211
  38. 192
  39. 194
  40. 216

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