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Mental Addition Worksheet

Speed calculation lesson 5: Running totals · Set 528 · 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. 1.83 + 47 + 34 + 35 =
  2. 2.74 + 83 + 17 + 74 =
  3. 3.26 + 70 + 62 + 28 =
  4. 4.57 + 12 + 31 + 32 =
  5. 5.38 + 54 + 27 + 39 =
  6. 6.59 + 17 + 81 + 21 =
  7. 7.23 + 65 + 61 + 56 =
  8. 8.62 + 71 + 77 + 31 =
  9. 9.83 + 63 + 18 + 46 =
  10. 10.54 + 48 + 58 + 74 =
  11. 11.77 + 55 + 69 + 18 =
  12. 12.84 + 63 + 51 + 85 =
  13. 13.59 + 77 + 59 + 12 =
  14. 14.58 + 13 + 89 + 49 =
  15. 15.85 + 32 + 74 + 47 =
  16. 16.16 + 74 + 85 + 87 =
  17. 17.48 + 76 + 38 + 61 =
  18. 18.39 + 87 + 22 + 39 =
  19. 19.41 + 26 + 22 + 87 =
  20. 20.58 + 33 + 43 + 19 =
  21. 21.21 + 39 + 87 + 31 =
  22. 22.79 + 70 + 64 + 62 =
  23. 23.16 + 85 + 29 + 31 =
  24. 24.53 + 73 + 74 + 64 =
  25. 25.61 + 73 + 47 + 31 =
  26. 26.32 + 84 + 45 + 48 =
  27. 27.65 + 30 + 79 + 20 =
  28. 28.76 + 52 + 49 + 26 =
  29. 29.11 + 72 + 80 + 59 =
  30. 30.18 + 24 + 11 + 50 =
  31. 31.60 + 51 + 86 + 48 =
  32. 32.12 + 65 + 11 + 87 =
  33. 33.46 + 15 + 71 + 86 =
  34. 34.44 + 22 + 59 + 81 =
  35. 35.26 + 63 + 13 + 62 =
  36. 36.86 + 79 + 46 + 36 =
  37. 37.32 + 30 + 11 + 38 =
  38. 38.48 + 55 + 31 + 62 =
  39. 39.33 + 89 + 43 + 65 =
  40. 40.17 + 65 + 18 + 63 =

Answer key

  1. 199
  2. 248
  3. 186
  4. 132
  5. 158
  6. 178
  7. 205
  8. 241
  9. 210
  10. 234
  11. 219
  12. 283
  13. 207
  14. 209
  15. 238
  16. 262
  17. 223
  18. 187
  19. 176
  20. 153
  21. 178
  22. 275
  23. 161
  24. 264
  25. 212
  26. 209
  27. 194
  28. 203
  29. 222
  30. 103
  31. 245
  32. 175
  33. 218
  34. 206
  35. 164
  36. 247
  37. 111
  38. 196
  39. 230
  40. 163

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