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Mental Addition Worksheet

Speed calculation lesson 5: Running totals · Set 835 · 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. 1.88 + 40 + 87 + 55 =
  2. 2.89 + 86 + 35 + 66 =
  3. 3.78 + 41 + 49 + 23 =
  4. 4.34 + 32 + 31 + 28 =
  5. 5.45 + 30 + 85 + 28 =
  6. 6.69 + 86 + 27 + 32 =
  7. 7.53 + 59 + 56 + 68 =
  8. 8.83 + 61 + 76 + 26 =
  9. 9.16 + 74 + 31 + 73 =
  10. 10.80 + 40 + 19 + 67 =
  11. 11.11 + 75 + 30 + 67 =
  12. 12.38 + 45 + 19 + 72 =
  13. 13.28 + 24 + 30 + 70 =
  14. 14.26 + 54 + 35 + 46 =
  15. 15.34 + 16 + 14 + 57 =
  16. 16.62 + 27 + 65 + 25 =
  17. 17.24 + 28 + 73 + 37 =
  18. 18.41 + 76 + 48 + 72 =
  19. 19.27 + 35 + 56 + 65 =
  20. 20.73 + 66 + 57 + 67 =
  21. 21.30 + 87 + 52 + 17 =
  22. 22.45 + 62 + 61 + 69 =
  23. 23.62 + 46 + 19 + 87 =
  24. 24.31 + 13 + 42 + 50 =
  25. 25.88 + 71 + 23 + 13 =
  26. 26.21 + 14 + 47 + 58 =
  27. 27.78 + 21 + 37 + 56 =
  28. 28.52 + 18 + 19 + 69 =
  29. 29.19 + 27 + 63 + 35 =
  30. 30.35 + 20 + 21 + 40 =
  31. 31.59 + 67 + 48 + 55 =
  32. 32.55 + 53 + 59 + 45 =
  33. 33.53 + 28 + 27 + 83 =
  34. 34.25 + 85 + 32 + 33 =
  35. 35.48 + 40 + 29 + 44 =
  36. 36.61 + 65 + 35 + 68 =
  37. 37.16 + 43 + 22 + 43 =
  38. 38.16 + 14 + 22 + 59 =
  39. 39.33 + 47 + 83 + 70 =
  40. 40.48 + 42 + 48 + 40 =

Answer key

  1. 270
  2. 276
  3. 191
  4. 125
  5. 188
  6. 214
  7. 236
  8. 246
  9. 194
  10. 206
  11. 183
  12. 174
  13. 152
  14. 161
  15. 121
  16. 179
  17. 162
  18. 237
  19. 183
  20. 263
  21. 186
  22. 237
  23. 214
  24. 136
  25. 195
  26. 140
  27. 192
  28. 158
  29. 144
  30. 116
  31. 229
  32. 212
  33. 191
  34. 175
  35. 161
  36. 229
  37. 124
  38. 111
  39. 233
  40. 178

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