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Mental Addition Worksheet

Speed calculation lesson 5: Running totals · Set 740 · 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. 1.46 + 86 + 30 + 76 =
  2. 2.26 + 72 + 87 + 85 =
  3. 3.27 + 88 + 53 + 62 =
  4. 4.25 + 53 + 35 + 40 =
  5. 5.40 + 40 + 65 + 36 =
  6. 6.82 + 28 + 66 + 31 =
  7. 7.14 + 17 + 31 + 69 =
  8. 8.37 + 89 + 39 + 63 =
  9. 9.56 + 20 + 29 + 80 =
  10. 10.59 + 47 + 64 + 87 =
  11. 11.41 + 11 + 34 + 30 =
  12. 12.46 + 77 + 85 + 89 =
  13. 13.59 + 58 + 62 + 50 =
  14. 14.34 + 52 + 21 + 28 =
  15. 15.59 + 25 + 16 + 27 =
  16. 16.30 + 89 + 23 + 18 =
  17. 17.56 + 21 + 45 + 84 =
  18. 18.28 + 52 + 86 + 19 =
  19. 19.33 + 89 + 54 + 29 =
  20. 20.19 + 13 + 72 + 57 =
  21. 21.36 + 76 + 33 + 58 =
  22. 22.31 + 77 + 57 + 22 =
  23. 23.60 + 73 + 85 + 17 =
  24. 24.21 + 73 + 26 + 68 =
  25. 25.39 + 40 + 87 + 30 =
  26. 26.15 + 48 + 23 + 19 =
  27. 27.19 + 46 + 18 + 20 =
  28. 28.30 + 61 + 84 + 81 =
  29. 29.64 + 51 + 79 + 31 =
  30. 30.67 + 32 + 54 + 65 =
  31. 31.80 + 18 + 79 + 58 =
  32. 32.23 + 27 + 45 + 87 =
  33. 33.34 + 41 + 54 + 28 =
  34. 34.75 + 73 + 30 + 36 =
  35. 35.30 + 46 + 18 + 11 =
  36. 36.37 + 76 + 20 + 70 =
  37. 37.79 + 27 + 55 + 55 =
  38. 38.63 + 41 + 25 + 37 =
  39. 39.47 + 28 + 29 + 76 =
  40. 40.88 + 28 + 28 + 62 =

Answer key

  1. 238
  2. 270
  3. 230
  4. 153
  5. 181
  6. 207
  7. 131
  8. 228
  9. 185
  10. 257
  11. 116
  12. 297
  13. 229
  14. 135
  15. 127
  16. 160
  17. 206
  18. 185
  19. 205
  20. 161
  21. 203
  22. 187
  23. 235
  24. 188
  25. 196
  26. 105
  27. 103
  28. 256
  29. 225
  30. 218
  31. 235
  32. 182
  33. 157
  34. 214
  35. 105
  36. 203
  37. 216
  38. 166
  39. 180
  40. 206

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