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Mental Addition Worksheet

Speed calculation lesson 5: Running totals · Set 910 · 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. 1.62 + 41 + 24 + 56 =
  2. 2.21 + 14 + 43 + 52 =
  3. 3.32 + 24 + 88 + 48 =
  4. 4.61 + 28 + 40 + 28 =
  5. 5.52 + 33 + 89 + 35 =
  6. 6.39 + 32 + 15 + 26 =
  7. 7.86 + 50 + 66 + 18 =
  8. 8.39 + 68 + 70 + 29 =
  9. 9.56 + 42 + 21 + 40 =
  10. 10.55 + 34 + 79 + 72 =
  11. 11.74 + 24 + 35 + 21 =
  12. 12.14 + 84 + 30 + 74 =
  13. 13.51 + 57 + 70 + 80 =
  14. 14.45 + 20 + 49 + 68 =
  15. 15.85 + 28 + 83 + 27 =
  16. 16.77 + 22 + 28 + 80 =
  17. 17.41 + 69 + 51 + 24 =
  18. 18.60 + 78 + 63 + 22 =
  19. 19.66 + 46 + 50 + 38 =
  20. 20.40 + 80 + 77 + 11 =
  21. 21.38 + 16 + 63 + 11 =
  22. 22.42 + 18 + 37 + 59 =
  23. 23.53 + 88 + 53 + 27 =
  24. 24.46 + 22 + 24 + 77 =
  25. 25.14 + 28 + 32 + 35 =
  26. 26.86 + 51 + 24 + 62 =
  27. 27.88 + 12 + 21 + 42 =
  28. 28.51 + 50 + 87 + 67 =
  29. 29.25 + 73 + 48 + 32 =
  30. 30.54 + 49 + 77 + 33 =
  31. 31.44 + 14 + 61 + 53 =
  32. 32.86 + 24 + 80 + 55 =
  33. 33.52 + 75 + 47 + 22 =
  34. 34.70 + 11 + 11 + 75 =
  35. 35.39 + 80 + 89 + 57 =
  36. 36.19 + 37 + 48 + 77 =
  37. 37.47 + 46 + 14 + 32 =
  38. 38.62 + 72 + 76 + 61 =
  39. 39.73 + 69 + 13 + 42 =
  40. 40.44 + 22 + 55 + 59 =

Answer key

  1. 183
  2. 130
  3. 192
  4. 157
  5. 209
  6. 112
  7. 220
  8. 206
  9. 159
  10. 240
  11. 154
  12. 202
  13. 258
  14. 182
  15. 223
  16. 207
  17. 185
  18. 223
  19. 200
  20. 208
  21. 128
  22. 156
  23. 221
  24. 169
  25. 109
  26. 223
  27. 163
  28. 255
  29. 178
  30. 213
  31. 172
  32. 245
  33. 196
  34. 167
  35. 265
  36. 181
  37. 139
  38. 271
  39. 197
  40. 180

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