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Mental Addition Worksheet

Speed calculation lesson 5: Running totals · Set 544 · 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. 1.17 + 48 + 57 + 55 =
  2. 2.42 + 32 + 37 + 18 =
  3. 3.32 + 46 + 86 + 57 =
  4. 4.35 + 85 + 65 + 13 =
  5. 5.89 + 15 + 21 + 87 =
  6. 6.16 + 67 + 73 + 79 =
  7. 7.44 + 43 + 82 + 35 =
  8. 8.70 + 13 + 20 + 53 =
  9. 9.45 + 81 + 52 + 50 =
  10. 10.12 + 47 + 72 + 16 =
  11. 11.38 + 15 + 22 + 55 =
  12. 12.22 + 43 + 59 + 18 =
  13. 13.54 + 13 + 14 + 52 =
  14. 14.49 + 84 + 36 + 32 =
  15. 15.62 + 82 + 61 + 63 =
  16. 16.50 + 70 + 73 + 63 =
  17. 17.16 + 14 + 85 + 23 =
  18. 18.40 + 41 + 85 + 27 =
  19. 19.83 + 16 + 46 + 43 =
  20. 20.44 + 78 + 79 + 57 =
  21. 21.68 + 25 + 55 + 16 =
  22. 22.44 + 11 + 55 + 27 =
  23. 23.34 + 75 + 55 + 70 =
  24. 24.38 + 14 + 57 + 17 =
  25. 25.51 + 27 + 62 + 39 =
  26. 26.83 + 55 + 48 + 50 =
  27. 27.75 + 85 + 19 + 59 =
  28. 28.63 + 88 + 46 + 19 =
  29. 29.58 + 86 + 78 + 29 =
  30. 30.62 + 19 + 29 + 75 =
  31. 31.19 + 72 + 21 + 59 =
  32. 32.89 + 42 + 54 + 28 =
  33. 33.42 + 27 + 25 + 17 =
  34. 34.48 + 25 + 89 + 63 =
  35. 35.66 + 55 + 37 + 11 =
  36. 36.49 + 75 + 56 + 47 =
  37. 37.76 + 44 + 42 + 61 =
  38. 38.72 + 15 + 77 + 58 =
  39. 39.32 + 15 + 87 + 69 =
  40. 40.22 + 89 + 48 + 56 =

Answer key

  1. 177
  2. 129
  3. 221
  4. 198
  5. 212
  6. 235
  7. 204
  8. 156
  9. 228
  10. 147
  11. 130
  12. 142
  13. 133
  14. 201
  15. 268
  16. 256
  17. 138
  18. 193
  19. 188
  20. 258
  21. 164
  22. 137
  23. 234
  24. 126
  25. 179
  26. 236
  27. 238
  28. 216
  29. 251
  30. 185
  31. 171
  32. 213
  33. 111
  34. 225
  35. 169
  36. 227
  37. 223
  38. 222
  39. 203
  40. 215

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