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Mental Addition Worksheet

Speed calculation lesson 5: Running totals · Set 681 · 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. 1.80 + 57 + 74 + 37 =
  2. 2.45 + 87 + 14 + 31 =
  3. 3.64 + 17 + 81 + 19 =
  4. 4.83 + 16 + 41 + 66 =
  5. 5.15 + 50 + 24 + 76 =
  6. 6.74 + 48 + 19 + 27 =
  7. 7.13 + 35 + 29 + 59 =
  8. 8.35 + 15 + 29 + 15 =
  9. 9.59 + 88 + 77 + 53 =
  10. 10.49 + 20 + 42 + 34 =
  11. 11.18 + 22 + 45 + 85 =
  12. 12.84 + 39 + 89 + 26 =
  13. 13.53 + 64 + 43 + 63 =
  14. 14.26 + 75 + 54 + 68 =
  15. 15.26 + 64 + 30 + 67 =
  16. 16.76 + 88 + 85 + 69 =
  17. 17.55 + 89 + 22 + 38 =
  18. 18.80 + 43 + 80 + 84 =
  19. 19.68 + 21 + 47 + 38 =
  20. 20.40 + 67 + 49 + 13 =
  21. 21.11 + 20 + 14 + 11 =
  22. 22.30 + 30 + 56 + 88 =
  23. 23.20 + 70 + 35 + 35 =
  24. 24.76 + 67 + 31 + 73 =
  25. 25.20 + 33 + 52 + 69 =
  26. 26.40 + 86 + 25 + 40 =
  27. 27.32 + 78 + 81 + 88 =
  28. 28.58 + 50 + 13 + 50 =
  29. 29.86 + 77 + 59 + 68 =
  30. 30.20 + 40 + 60 + 85 =
  31. 31.56 + 79 + 87 + 52 =
  32. 32.71 + 29 + 71 + 32 =
  33. 33.51 + 34 + 17 + 58 =
  34. 34.45 + 88 + 11 + 24 =
  35. 35.41 + 21 + 46 + 35 =
  36. 36.19 + 74 + 83 + 16 =
  37. 37.65 + 86 + 23 + 37 =
  38. 38.28 + 55 + 18 + 25 =
  39. 39.11 + 19 + 61 + 27 =
  40. 40.18 + 31 + 84 + 42 =

Answer key

  1. 248
  2. 177
  3. 181
  4. 206
  5. 165
  6. 168
  7. 136
  8. 94
  9. 277
  10. 145
  11. 170
  12. 238
  13. 223
  14. 223
  15. 187
  16. 318
  17. 204
  18. 287
  19. 174
  20. 169
  21. 56
  22. 204
  23. 160
  24. 247
  25. 174
  26. 191
  27. 279
  28. 171
  29. 290
  30. 205
  31. 274
  32. 203
  33. 160
  34. 168
  35. 143
  36. 192
  37. 211
  38. 126
  39. 118
  40. 175

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