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Mental Addition Worksheet

Speed calculation lesson 5: Running totals · Set 17 · 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. 1.82 + 20 + 45 + 67 =
  2. 2.64 + 74 + 18 + 24 =
  3. 3.20 + 35 + 22 + 67 =
  4. 4.86 + 75 + 63 + 36 =
  5. 5.74 + 21 + 12 + 55 =
  6. 6.45 + 16 + 49 + 61 =
  7. 7.19 + 63 + 42 + 87 =
  8. 8.38 + 56 + 43 + 18 =
  9. 9.48 + 25 + 13 + 20 =
  10. 10.18 + 34 + 17 + 49 =
  11. 11.74 + 12 + 26 + 36 =
  12. 12.39 + 57 + 25 + 17 =
  13. 13.71 + 43 + 63 + 41 =
  14. 14.53 + 67 + 45 + 26 =
  15. 15.18 + 84 + 71 + 25 =
  16. 16.34 + 78 + 53 + 68 =
  17. 17.59 + 76 + 87 + 24 =
  18. 18.35 + 52 + 36 + 61 =
  19. 19.16 + 45 + 76 + 33 =
  20. 20.76 + 33 + 18 + 25 =
  21. 21.63 + 66 + 61 + 41 =
  22. 22.76 + 35 + 60 + 21 =
  23. 23.19 + 81 + 53 + 31 =
  24. 24.57 + 54 + 40 + 13 =
  25. 25.24 + 63 + 42 + 31 =
  26. 26.32 + 43 + 25 + 63 =
  27. 27.31 + 16 + 68 + 64 =
  28. 28.82 + 22 + 22 + 35 =
  29. 29.80 + 69 + 89 + 22 =
  30. 30.29 + 41 + 16 + 44 =
  31. 31.61 + 14 + 81 + 53 =
  32. 32.14 + 52 + 24 + 40 =
  33. 33.38 + 58 + 44 + 57 =
  34. 34.21 + 89 + 89 + 52 =
  35. 35.25 + 23 + 75 + 53 =
  36. 36.35 + 66 + 12 + 23 =
  37. 37.49 + 87 + 30 + 89 =
  38. 38.17 + 63 + 52 + 87 =
  39. 39.27 + 34 + 23 + 40 =
  40. 40.69 + 68 + 61 + 14 =

Answer key

  1. 214
  2. 180
  3. 144
  4. 260
  5. 162
  6. 171
  7. 211
  8. 155
  9. 106
  10. 118
  11. 148
  12. 138
  13. 218
  14. 191
  15. 198
  16. 233
  17. 246
  18. 184
  19. 170
  20. 152
  21. 231
  22. 192
  23. 184
  24. 164
  25. 160
  26. 163
  27. 179
  28. 161
  29. 260
  30. 130
  31. 209
  32. 130
  33. 197
  34. 251
  35. 176
  36. 136
  37. 255
  38. 219
  39. 124
  40. 212

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