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Mental Addition Worksheet

Speed calculation lesson 5: Running totals · Set 30 · 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. 1.17 + 34 + 33 + 28 =
  2. 2.41 + 53 + 42 + 67 =
  3. 3.22 + 73 + 35 + 14 =
  4. 4.12 + 62 + 73 + 75 =
  5. 5.57 + 59 + 32 + 80 =
  6. 6.53 + 46 + 39 + 72 =
  7. 7.19 + 13 + 63 + 75 =
  8. 8.55 + 72 + 16 + 52 =
  9. 9.61 + 31 + 46 + 26 =
  10. 10.63 + 56 + 42 + 59 =
  11. 11.82 + 63 + 58 + 76 =
  12. 12.55 + 53 + 23 + 57 =
  13. 13.33 + 58 + 63 + 14 =
  14. 14.63 + 56 + 31 + 31 =
  15. 15.60 + 23 + 19 + 25 =
  16. 16.87 + 69 + 55 + 68 =
  17. 17.18 + 48 + 29 + 52 =
  18. 18.46 + 19 + 20 + 25 =
  19. 19.71 + 20 + 51 + 13 =
  20. 20.15 + 67 + 36 + 85 =
  21. 21.80 + 58 + 44 + 33 =
  22. 22.40 + 81 + 84 + 78 =
  23. 23.20 + 39 + 73 + 51 =
  24. 24.31 + 59 + 21 + 63 =
  25. 25.12 + 43 + 46 + 30 =
  26. 26.65 + 21 + 85 + 18 =
  27. 27.43 + 56 + 17 + 12 =
  28. 28.32 + 34 + 19 + 11 =
  29. 29.72 + 18 + 81 + 85 =
  30. 30.67 + 64 + 81 + 15 =
  31. 31.60 + 60 + 65 + 88 =
  32. 32.18 + 57 + 51 + 44 =
  33. 33.34 + 61 + 76 + 49 =
  34. 34.12 + 50 + 64 + 14 =
  35. 35.48 + 85 + 12 + 12 =
  36. 36.61 + 14 + 38 + 57 =
  37. 37.53 + 31 + 74 + 66 =
  38. 38.26 + 81 + 21 + 76 =
  39. 39.71 + 40 + 17 + 16 =
  40. 40.71 + 85 + 38 + 14 =

Answer key

  1. 112
  2. 203
  3. 144
  4. 222
  5. 228
  6. 210
  7. 170
  8. 195
  9. 164
  10. 220
  11. 279
  12. 188
  13. 168
  14. 181
  15. 127
  16. 279
  17. 147
  18. 110
  19. 155
  20. 203
  21. 215
  22. 283
  23. 183
  24. 174
  25. 131
  26. 189
  27. 128
  28. 96
  29. 256
  30. 227
  31. 273
  32. 170
  33. 220
  34. 140
  35. 157
  36. 170
  37. 224
  38. 204
  39. 144
  40. 208

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