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Mental Addition Worksheet

Speed calculation lesson 5: Running totals · Set 648 · 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 + 40 + 34 + 21 =
  2. 2.52 + 44 + 60 + 66 =
  3. 3.11 + 59 + 59 + 80 =
  4. 4.26 + 74 + 13 + 11 =
  5. 5.13 + 52 + 69 + 22 =
  6. 6.30 + 36 + 54 + 89 =
  7. 7.45 + 57 + 75 + 45 =
  8. 8.11 + 18 + 40 + 16 =
  9. 9.86 + 65 + 18 + 51 =
  10. 10.37 + 54 + 79 + 63 =
  11. 11.64 + 84 + 16 + 89 =
  12. 12.28 + 77 + 21 + 84 =
  13. 13.71 + 24 + 18 + 80 =
  14. 14.66 + 34 + 59 + 38 =
  15. 15.40 + 73 + 86 + 56 =
  16. 16.57 + 54 + 60 + 36 =
  17. 17.30 + 11 + 36 + 58 =
  18. 18.29 + 73 + 47 + 16 =
  19. 19.29 + 44 + 80 + 65 =
  20. 20.68 + 89 + 45 + 24 =
  21. 21.28 + 68 + 54 + 77 =
  22. 22.42 + 36 + 63 + 63 =
  23. 23.15 + 88 + 86 + 86 =
  24. 24.63 + 38 + 88 + 35 =
  25. 25.11 + 42 + 17 + 41 =
  26. 26.24 + 69 + 12 + 12 =
  27. 27.42 + 86 + 79 + 81 =
  28. 28.19 + 80 + 56 + 82 =
  29. 29.84 + 31 + 43 + 31 =
  30. 30.27 + 86 + 89 + 22 =
  31. 31.32 + 75 + 74 + 66 =
  32. 32.25 + 58 + 22 + 27 =
  33. 33.30 + 47 + 24 + 12 =
  34. 34.38 + 79 + 14 + 34 =
  35. 35.62 + 74 + 25 + 84 =
  36. 36.55 + 74 + 42 + 86 =
  37. 37.17 + 72 + 32 + 37 =
  38. 38.49 + 38 + 12 + 38 =
  39. 39.32 + 18 + 62 + 16 =
  40. 40.50 + 45 + 36 + 68 =

Answer key

  1. 160
  2. 222
  3. 209
  4. 124
  5. 156
  6. 209
  7. 222
  8. 85
  9. 220
  10. 233
  11. 253
  12. 210
  13. 193
  14. 197
  15. 255
  16. 207
  17. 135
  18. 165
  19. 218
  20. 226
  21. 227
  22. 204
  23. 275
  24. 224
  25. 111
  26. 117
  27. 288
  28. 237
  29. 189
  30. 224
  31. 247
  32. 132
  33. 113
  34. 165
  35. 245
  36. 257
  37. 158
  38. 137
  39. 128
  40. 199

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