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Mental Addition Worksheet

Speed calculation lesson 5: Running totals · Set 957 · 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. 1.71 + 12 + 77 + 72 =
  2. 2.42 + 81 + 43 + 62 =
  3. 3.85 + 60 + 89 + 57 =
  4. 4.86 + 61 + 39 + 43 =
  5. 5.49 + 12 + 24 + 33 =
  6. 6.15 + 51 + 69 + 37 =
  7. 7.70 + 89 + 69 + 12 =
  8. 8.52 + 58 + 63 + 16 =
  9. 9.15 + 25 + 13 + 35 =
  10. 10.32 + 87 + 79 + 72 =
  11. 11.16 + 20 + 22 + 36 =
  12. 12.30 + 53 + 37 + 83 =
  13. 13.73 + 74 + 26 + 19 =
  14. 14.23 + 77 + 87 + 33 =
  15. 15.72 + 67 + 52 + 12 =
  16. 16.46 + 39 + 38 + 88 =
  17. 17.62 + 66 + 38 + 56 =
  18. 18.60 + 47 + 41 + 46 =
  19. 19.74 + 21 + 26 + 11 =
  20. 20.40 + 17 + 15 + 56 =
  21. 21.27 + 11 + 45 + 86 =
  22. 22.25 + 38 + 61 + 53 =
  23. 23.82 + 83 + 87 + 22 =
  24. 24.79 + 70 + 63 + 27 =
  25. 25.23 + 13 + 68 + 56 =
  26. 26.32 + 39 + 81 + 57 =
  27. 27.78 + 36 + 15 + 87 =
  28. 28.52 + 61 + 61 + 35 =
  29. 29.38 + 56 + 25 + 59 =
  30. 30.59 + 22 + 21 + 32 =
  31. 31.22 + 70 + 14 + 89 =
  32. 32.68 + 19 + 57 + 59 =
  33. 33.20 + 25 + 62 + 22 =
  34. 34.85 + 72 + 56 + 78 =
  35. 35.76 + 17 + 22 + 83 =
  36. 36.73 + 30 + 48 + 40 =
  37. 37.34 + 81 + 18 + 15 =
  38. 38.55 + 26 + 46 + 47 =
  39. 39.34 + 13 + 67 + 33 =
  40. 40.80 + 63 + 25 + 55 =

Answer key

  1. 232
  2. 228
  3. 291
  4. 229
  5. 118
  6. 172
  7. 240
  8. 189
  9. 88
  10. 270
  11. 94
  12. 203
  13. 192
  14. 220
  15. 203
  16. 211
  17. 222
  18. 194
  19. 132
  20. 128
  21. 169
  22. 177
  23. 274
  24. 239
  25. 160
  26. 209
  27. 216
  28. 209
  29. 178
  30. 134
  31. 195
  32. 203
  33. 129
  34. 291
  35. 198
  36. 191
  37. 148
  38. 174
  39. 147
  40. 223

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