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Mental Addition Worksheet

Speed calculation lesson 5: Running totals · Set 478 · 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. 1.24 + 12 + 64 + 14 =
  2. 2.19 + 32 + 69 + 14 =
  3. 3.29 + 34 + 28 + 43 =
  4. 4.54 + 24 + 89 + 29 =
  5. 5.19 + 86 + 16 + 61 =
  6. 6.55 + 77 + 21 + 62 =
  7. 7.79 + 41 + 50 + 32 =
  8. 8.29 + 15 + 77 + 39 =
  9. 9.70 + 17 + 72 + 59 =
  10. 10.21 + 26 + 49 + 52 =
  11. 11.18 + 61 + 48 + 62 =
  12. 12.43 + 70 + 53 + 58 =
  13. 13.80 + 55 + 63 + 58 =
  14. 14.44 + 28 + 61 + 70 =
  15. 15.80 + 74 + 49 + 53 =
  16. 16.30 + 62 + 43 + 26 =
  17. 17.67 + 33 + 17 + 79 =
  18. 18.16 + 44 + 55 + 86 =
  19. 19.26 + 72 + 23 + 83 =
  20. 20.69 + 27 + 22 + 41 =
  21. 21.84 + 66 + 55 + 21 =
  22. 22.77 + 78 + 81 + 57 =
  23. 23.49 + 15 + 56 + 54 =
  24. 24.31 + 11 + 23 + 88 =
  25. 25.86 + 27 + 54 + 29 =
  26. 26.59 + 29 + 84 + 59 =
  27. 27.71 + 79 + 81 + 45 =
  28. 28.22 + 23 + 14 + 51 =
  29. 29.75 + 26 + 34 + 22 =
  30. 30.68 + 47 + 84 + 64 =
  31. 31.18 + 55 + 23 + 26 =
  32. 32.65 + 22 + 27 + 54 =
  33. 33.23 + 49 + 21 + 77 =
  34. 34.28 + 68 + 78 + 60 =
  35. 35.75 + 76 + 17 + 83 =
  36. 36.71 + 49 + 77 + 19 =
  37. 37.25 + 67 + 50 + 26 =
  38. 38.22 + 73 + 87 + 46 =
  39. 39.78 + 45 + 12 + 36 =
  40. 40.26 + 71 + 62 + 61 =

Answer key

  1. 114
  2. 134
  3. 134
  4. 196
  5. 182
  6. 215
  7. 202
  8. 160
  9. 218
  10. 148
  11. 189
  12. 224
  13. 256
  14. 203
  15. 256
  16. 161
  17. 196
  18. 201
  19. 204
  20. 159
  21. 226
  22. 293
  23. 174
  24. 153
  25. 196
  26. 231
  27. 276
  28. 110
  29. 157
  30. 263
  31. 122
  32. 168
  33. 170
  34. 234
  35. 251
  36. 216
  37. 168
  38. 228
  39. 171
  40. 220

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