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Mental Addition Worksheet

Speed calculation lesson 5: Running totals · Set 353 · 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. 1.26 + 43 + 65 + 43 =
  2. 2.37 + 79 + 13 + 57 =
  3. 3.86 + 71 + 25 + 87 =
  4. 4.50 + 87 + 72 + 37 =
  5. 5.81 + 43 + 62 + 47 =
  6. 6.33 + 52 + 37 + 80 =
  7. 7.80 + 74 + 14 + 35 =
  8. 8.88 + 34 + 72 + 28 =
  9. 9.59 + 52 + 75 + 23 =
  10. 10.85 + 24 + 72 + 63 =
  11. 11.47 + 41 + 33 + 32 =
  12. 12.27 + 73 + 42 + 86 =
  13. 13.45 + 32 + 86 + 56 =
  14. 14.82 + 14 + 74 + 64 =
  15. 15.36 + 67 + 86 + 67 =
  16. 16.24 + 74 + 34 + 20 =
  17. 17.19 + 50 + 79 + 16 =
  18. 18.68 + 79 + 65 + 77 =
  19. 19.11 + 38 + 39 + 73 =
  20. 20.58 + 39 + 28 + 22 =
  21. 21.51 + 44 + 76 + 71 =
  22. 22.50 + 18 + 27 + 61 =
  23. 23.44 + 54 + 89 + 53 =
  24. 24.75 + 40 + 16 + 30 =
  25. 25.32 + 13 + 14 + 60 =
  26. 26.35 + 15 + 56 + 22 =
  27. 27.18 + 83 + 20 + 88 =
  28. 28.68 + 74 + 31 + 36 =
  29. 29.75 + 69 + 53 + 18 =
  30. 30.11 + 26 + 24 + 31 =
  31. 31.67 + 45 + 36 + 35 =
  32. 32.20 + 20 + 11 + 87 =
  33. 33.13 + 28 + 12 + 27 =
  34. 34.86 + 30 + 51 + 59 =
  35. 35.12 + 63 + 62 + 80 =
  36. 36.26 + 51 + 26 + 28 =
  37. 37.67 + 17 + 73 + 39 =
  38. 38.22 + 68 + 65 + 78 =
  39. 39.11 + 89 + 25 + 43 =
  40. 40.83 + 15 + 64 + 21 =

Answer key

  1. 177
  2. 186
  3. 269
  4. 246
  5. 233
  6. 202
  7. 203
  8. 222
  9. 209
  10. 244
  11. 153
  12. 228
  13. 219
  14. 234
  15. 256
  16. 152
  17. 164
  18. 289
  19. 161
  20. 147
  21. 242
  22. 156
  23. 240
  24. 161
  25. 119
  26. 128
  27. 209
  28. 209
  29. 215
  30. 92
  31. 183
  32. 138
  33. 80
  34. 226
  35. 217
  36. 131
  37. 196
  38. 233
  39. 168
  40. 183

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