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Mental Addition Worksheet

Speed calculation lesson 5: Running totals · Set 335 · 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. 1.71 + 22 + 83 + 67 =
  2. 2.63 + 57 + 68 + 39 =
  3. 3.76 + 74 + 23 + 51 =
  4. 4.71 + 52 + 15 + 18 =
  5. 5.64 + 39 + 73 + 65 =
  6. 6.85 + 15 + 88 + 58 =
  7. 7.29 + 84 + 70 + 13 =
  8. 8.66 + 19 + 82 + 23 =
  9. 9.70 + 78 + 53 + 79 =
  10. 10.33 + 16 + 79 + 33 =
  11. 11.11 + 66 + 18 + 87 =
  12. 12.55 + 14 + 26 + 32 =
  13. 13.60 + 22 + 24 + 35 =
  14. 14.80 + 40 + 78 + 85 =
  15. 15.85 + 28 + 43 + 32 =
  16. 16.38 + 65 + 78 + 72 =
  17. 17.73 + 88 + 17 + 87 =
  18. 18.50 + 62 + 36 + 74 =
  19. 19.73 + 40 + 82 + 57 =
  20. 20.72 + 15 + 29 + 15 =
  21. 21.54 + 45 + 46 + 20 =
  22. 22.28 + 32 + 86 + 84 =
  23. 23.83 + 70 + 64 + 39 =
  24. 24.84 + 61 + 76 + 16 =
  25. 25.58 + 15 + 60 + 60 =
  26. 26.38 + 54 + 54 + 28 =
  27. 27.46 + 25 + 67 + 57 =
  28. 28.78 + 72 + 16 + 15 =
  29. 29.54 + 75 + 47 + 15 =
  30. 30.55 + 67 + 78 + 32 =
  31. 31.47 + 58 + 42 + 76 =
  32. 32.15 + 79 + 81 + 34 =
  33. 33.82 + 34 + 59 + 52 =
  34. 34.30 + 42 + 36 + 77 =
  35. 35.18 + 81 + 24 + 47 =
  36. 36.81 + 71 + 69 + 20 =
  37. 37.21 + 40 + 18 + 73 =
  38. 38.77 + 82 + 71 + 74 =
  39. 39.37 + 35 + 51 + 48 =
  40. 40.65 + 34 + 16 + 84 =

Answer key

  1. 243
  2. 227
  3. 224
  4. 156
  5. 241
  6. 246
  7. 196
  8. 190
  9. 280
  10. 161
  11. 182
  12. 127
  13. 141
  14. 283
  15. 188
  16. 253
  17. 265
  18. 222
  19. 252
  20. 131
  21. 165
  22. 230
  23. 256
  24. 237
  25. 193
  26. 174
  27. 195
  28. 181
  29. 191
  30. 232
  31. 223
  32. 209
  33. 227
  34. 185
  35. 170
  36. 241
  37. 152
  38. 304
  39. 171
  40. 199

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