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Mental Addition Worksheet

Speed calculation lesson 5: Running totals · Set 769 · 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. 1.50 + 89 + 18 + 89 =
  2. 2.53 + 65 + 61 + 36 =
  3. 3.87 + 44 + 32 + 71 =
  4. 4.26 + 18 + 68 + 17 =
  5. 5.43 + 55 + 31 + 23 =
  6. 6.39 + 83 + 66 + 72 =
  7. 7.66 + 14 + 43 + 71 =
  8. 8.19 + 33 + 78 + 11 =
  9. 9.74 + 45 + 81 + 74 =
  10. 10.78 + 39 + 44 + 24 =
  11. 11.50 + 51 + 52 + 35 =
  12. 12.75 + 28 + 33 + 65 =
  13. 13.73 + 54 + 42 + 69 =
  14. 14.39 + 67 + 80 + 67 =
  15. 15.73 + 26 + 37 + 74 =
  16. 16.15 + 32 + 67 + 16 =
  17. 17.89 + 24 + 36 + 73 =
  18. 18.72 + 43 + 64 + 33 =
  19. 19.45 + 53 + 38 + 15 =
  20. 20.42 + 25 + 17 + 36 =
  21. 21.18 + 27 + 14 + 34 =
  22. 22.22 + 37 + 87 + 87 =
  23. 23.41 + 47 + 22 + 86 =
  24. 24.39 + 68 + 26 + 25 =
  25. 25.48 + 44 + 89 + 23 =
  26. 26.55 + 24 + 87 + 20 =
  27. 27.28 + 57 + 43 + 17 =
  28. 28.16 + 28 + 59 + 15 =
  29. 29.20 + 87 + 45 + 45 =
  30. 30.37 + 87 + 21 + 36 =
  31. 31.30 + 86 + 67 + 19 =
  32. 32.51 + 21 + 22 + 32 =
  33. 33.36 + 19 + 42 + 70 =
  34. 34.40 + 25 + 31 + 72 =
  35. 35.18 + 56 + 32 + 69 =
  36. 36.61 + 53 + 17 + 23 =
  37. 37.78 + 58 + 22 + 70 =
  38. 38.77 + 68 + 30 + 72 =
  39. 39.75 + 13 + 33 + 19 =
  40. 40.26 + 46 + 20 + 88 =

Answer key

  1. 246
  2. 215
  3. 234
  4. 129
  5. 152
  6. 260
  7. 194
  8. 141
  9. 274
  10. 185
  11. 188
  12. 201
  13. 238
  14. 253
  15. 210
  16. 130
  17. 222
  18. 212
  19. 151
  20. 120
  21. 93
  22. 233
  23. 196
  24. 158
  25. 204
  26. 186
  27. 145
  28. 118
  29. 197
  30. 181
  31. 202
  32. 126
  33. 167
  34. 168
  35. 175
  36. 154
  37. 228
  38. 247
  39. 140
  40. 180

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