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Mental Addition Worksheet

Speed calculation lesson 5: Running totals · Set 282 · 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. 1.65 + 18 + 12 + 89 =
  2. 2.15 + 29 + 81 + 88 =
  3. 3.87 + 21 + 26 + 24 =
  4. 4.17 + 45 + 33 + 52 =
  5. 5.23 + 13 + 80 + 12 =
  6. 6.30 + 22 + 39 + 38 =
  7. 7.83 + 32 + 36 + 15 =
  8. 8.34 + 62 + 53 + 87 =
  9. 9.38 + 73 + 81 + 36 =
  10. 10.73 + 52 + 44 + 78 =
  11. 11.51 + 74 + 64 + 18 =
  12. 12.26 + 86 + 74 + 82 =
  13. 13.39 + 34 + 28 + 29 =
  14. 14.71 + 87 + 28 + 27 =
  15. 15.33 + 48 + 44 + 20 =
  16. 16.24 + 16 + 39 + 11 =
  17. 17.38 + 14 + 62 + 67 =
  18. 18.12 + 13 + 42 + 36 =
  19. 19.48 + 26 + 60 + 53 =
  20. 20.70 + 74 + 75 + 88 =
  21. 21.19 + 40 + 39 + 53 =
  22. 22.28 + 66 + 46 + 81 =
  23. 23.20 + 31 + 74 + 15 =
  24. 24.80 + 56 + 82 + 38 =
  25. 25.58 + 21 + 39 + 26 =
  26. 26.13 + 22 + 48 + 26 =
  27. 27.75 + 72 + 20 + 35 =
  28. 28.38 + 62 + 68 + 75 =
  29. 29.87 + 60 + 62 + 25 =
  30. 30.30 + 61 + 36 + 49 =
  31. 31.87 + 19 + 71 + 19 =
  32. 32.30 + 42 + 33 + 30 =
  33. 33.73 + 36 + 39 + 41 =
  34. 34.13 + 71 + 17 + 80 =
  35. 35.44 + 28 + 63 + 89 =
  36. 36.82 + 78 + 15 + 18 =
  37. 37.66 + 49 + 26 + 40 =
  38. 38.54 + 11 + 84 + 59 =
  39. 39.14 + 47 + 83 + 29 =
  40. 40.31 + 48 + 21 + 81 =

Answer key

  1. 184
  2. 213
  3. 158
  4. 147
  5. 128
  6. 129
  7. 166
  8. 236
  9. 228
  10. 247
  11. 207
  12. 268
  13. 130
  14. 213
  15. 145
  16. 90
  17. 181
  18. 103
  19. 187
  20. 307
  21. 151
  22. 221
  23. 140
  24. 256
  25. 144
  26. 109
  27. 202
  28. 243
  29. 234
  30. 176
  31. 196
  32. 135
  33. 189
  34. 181
  35. 224
  36. 193
  37. 181
  38. 208
  39. 173
  40. 181

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