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Mental Addition Worksheet

Speed calculation lesson 5: Running totals · Set 761 · 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. 1.58 + 32 + 31 + 28 =
  2. 2.21 + 21 + 18 + 28 =
  3. 3.65 + 14 + 18 + 23 =
  4. 4.25 + 85 + 50 + 84 =
  5. 5.84 + 16 + 46 + 44 =
  6. 6.55 + 65 + 11 + 24 =
  7. 7.68 + 37 + 59 + 13 =
  8. 8.25 + 45 + 21 + 69 =
  9. 9.67 + 21 + 70 + 20 =
  10. 10.67 + 53 + 36 + 54 =
  11. 11.12 + 38 + 49 + 70 =
  12. 12.28 + 69 + 38 + 67 =
  13. 13.85 + 82 + 79 + 16 =
  14. 14.21 + 28 + 57 + 52 =
  15. 15.58 + 13 + 28 + 39 =
  16. 16.24 + 46 + 63 + 40 =
  17. 17.29 + 28 + 21 + 43 =
  18. 18.49 + 35 + 11 + 68 =
  19. 19.19 + 70 + 53 + 85 =
  20. 20.46 + 59 + 25 + 65 =
  21. 21.50 + 17 + 58 + 47 =
  22. 22.29 + 73 + 23 + 23 =
  23. 23.68 + 13 + 35 + 33 =
  24. 24.50 + 77 + 59 + 61 =
  25. 25.55 + 47 + 67 + 76 =
  26. 26.64 + 67 + 63 + 43 =
  27. 27.49 + 37 + 80 + 55 =
  28. 28.80 + 81 + 48 + 82 =
  29. 29.18 + 47 + 26 + 50 =
  30. 30.73 + 73 + 20 + 32 =
  31. 31.60 + 51 + 37 + 50 =
  32. 32.17 + 62 + 73 + 87 =
  33. 33.73 + 23 + 72 + 79 =
  34. 34.60 + 20 + 40 + 37 =
  35. 35.76 + 60 + 57 + 75 =
  36. 36.70 + 12 + 67 + 36 =
  37. 37.77 + 73 + 66 + 18 =
  38. 38.73 + 14 + 41 + 13 =
  39. 39.38 + 59 + 59 + 68 =
  40. 40.60 + 42 + 41 + 87 =

Answer key

  1. 149
  2. 88
  3. 120
  4. 244
  5. 190
  6. 155
  7. 177
  8. 160
  9. 178
  10. 210
  11. 169
  12. 202
  13. 262
  14. 158
  15. 138
  16. 173
  17. 121
  18. 163
  19. 227
  20. 195
  21. 172
  22. 148
  23. 149
  24. 247
  25. 245
  26. 237
  27. 221
  28. 291
  29. 141
  30. 198
  31. 198
  32. 239
  33. 247
  34. 157
  35. 268
  36. 185
  37. 234
  38. 141
  39. 224
  40. 230

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