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Mental Addition Worksheet

Speed calculation lesson 5: Running totals · Set 48 · 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. 1.21 + 63 + 67 + 86 =
  2. 2.49 + 22 + 24 + 59 =
  3. 3.30 + 53 + 62 + 49 =
  4. 4.69 + 68 + 61 + 12 =
  5. 5.60 + 25 + 17 + 72 =
  6. 6.54 + 29 + 22 + 23 =
  7. 7.22 + 19 + 20 + 13 =
  8. 8.67 + 42 + 35 + 70 =
  9. 9.80 + 20 + 61 + 59 =
  10. 10.15 + 25 + 88 + 13 =
  11. 11.81 + 72 + 33 + 71 =
  12. 12.53 + 14 + 14 + 68 =
  13. 13.76 + 74 + 74 + 85 =
  14. 14.37 + 58 + 23 + 54 =
  15. 15.29 + 35 + 75 + 23 =
  16. 16.21 + 64 + 65 + 48 =
  17. 17.49 + 41 + 60 + 64 =
  18. 18.14 + 20 + 55 + 59 =
  19. 19.12 + 53 + 75 + 19 =
  20. 20.14 + 61 + 25 + 33 =
  21. 21.33 + 51 + 71 + 40 =
  22. 22.53 + 49 + 18 + 68 =
  23. 23.65 + 44 + 74 + 56 =
  24. 24.58 + 82 + 41 + 86 =
  25. 25.89 + 11 + 31 + 80 =
  26. 26.88 + 20 + 37 + 21 =
  27. 27.22 + 83 + 68 + 36 =
  28. 28.69 + 65 + 72 + 21 =
  29. 29.88 + 28 + 24 + 27 =
  30. 30.31 + 20 + 62 + 41 =
  31. 31.54 + 35 + 87 + 14 =
  32. 32.83 + 60 + 53 + 17 =
  33. 33.47 + 26 + 26 + 49 =
  34. 34.28 + 32 + 17 + 51 =
  35. 35.25 + 35 + 42 + 81 =
  36. 36.39 + 84 + 58 + 47 =
  37. 37.26 + 81 + 18 + 27 =
  38. 38.11 + 35 + 34 + 80 =
  39. 39.20 + 31 + 89 + 35 =
  40. 40.45 + 30 + 36 + 74 =

Answer key

  1. 237
  2. 154
  3. 194
  4. 210
  5. 174
  6. 128
  7. 74
  8. 214
  9. 220
  10. 141
  11. 257
  12. 149
  13. 309
  14. 172
  15. 162
  16. 198
  17. 214
  18. 148
  19. 159
  20. 133
  21. 195
  22. 188
  23. 239
  24. 267
  25. 211
  26. 166
  27. 209
  28. 227
  29. 167
  30. 154
  31. 190
  32. 213
  33. 148
  34. 128
  35. 183
  36. 228
  37. 152
  38. 160
  39. 175
  40. 185

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