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Mental Addition Worksheet

Speed calculation lesson 5: Running totals · Set 281 · 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. 1.52 + 15 + 53 + 54 =
  2. 2.25 + 83 + 37 + 72 =
  3. 3.17 + 40 + 50 + 16 =
  4. 4.85 + 11 + 65 + 68 =
  5. 5.86 + 81 + 50 + 18 =
  6. 6.11 + 58 + 41 + 36 =
  7. 7.12 + 61 + 34 + 49 =
  8. 8.87 + 49 + 37 + 84 =
  9. 9.84 + 27 + 40 + 32 =
  10. 10.57 + 40 + 67 + 20 =
  11. 11.51 + 19 + 36 + 85 =
  12. 12.73 + 50 + 29 + 82 =
  13. 13.74 + 23 + 22 + 30 =
  14. 14.27 + 73 + 23 + 50 =
  15. 15.89 + 47 + 65 + 67 =
  16. 16.80 + 39 + 13 + 11 =
  17. 17.71 + 16 + 88 + 57 =
  18. 18.53 + 42 + 71 + 61 =
  19. 19.60 + 85 + 13 + 65 =
  20. 20.58 + 79 + 24 + 42 =
  21. 21.31 + 26 + 57 + 78 =
  22. 22.80 + 78 + 36 + 80 =
  23. 23.34 + 51 + 11 + 32 =
  24. 24.56 + 55 + 50 + 35 =
  25. 25.29 + 20 + 43 + 44 =
  26. 26.24 + 14 + 18 + 83 =
  27. 27.18 + 40 + 69 + 47 =
  28. 28.79 + 27 + 40 + 27 =
  29. 29.89 + 67 + 75 + 32 =
  30. 30.30 + 26 + 56 + 18 =
  31. 31.17 + 32 + 51 + 38 =
  32. 32.31 + 27 + 76 + 86 =
  33. 33.36 + 59 + 68 + 39 =
  34. 34.48 + 27 + 69 + 80 =
  35. 35.34 + 57 + 15 + 58 =
  36. 36.18 + 84 + 25 + 28 =
  37. 37.53 + 57 + 53 + 52 =
  38. 38.36 + 32 + 26 + 54 =
  39. 39.25 + 66 + 35 + 32 =
  40. 40.70 + 16 + 65 + 43 =

Answer key

  1. 174
  2. 217
  3. 123
  4. 229
  5. 235
  6. 146
  7. 156
  8. 257
  9. 183
  10. 184
  11. 191
  12. 234
  13. 149
  14. 173
  15. 268
  16. 143
  17. 232
  18. 227
  19. 223
  20. 203
  21. 192
  22. 274
  23. 128
  24. 196
  25. 136
  26. 139
  27. 174
  28. 173
  29. 263
  30. 130
  31. 138
  32. 220
  33. 202
  34. 224
  35. 164
  36. 155
  37. 215
  38. 148
  39. 158
  40. 194

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