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Mental Addition Worksheet

Speed calculation lesson 5: Running totals · Set 288 · 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. 1.51 + 40 + 49 + 18 =
  2. 2.82 + 80 + 29 + 43 =
  3. 3.79 + 13 + 18 + 16 =
  4. 4.88 + 24 + 77 + 38 =
  5. 5.30 + 32 + 47 + 78 =
  6. 6.31 + 80 + 38 + 12 =
  7. 7.62 + 13 + 82 + 31 =
  8. 8.54 + 27 + 77 + 25 =
  9. 9.33 + 31 + 22 + 48 =
  10. 10.29 + 86 + 64 + 49 =
  11. 11.57 + 52 + 21 + 54 =
  12. 12.12 + 33 + 28 + 35 =
  13. 13.38 + 18 + 56 + 74 =
  14. 14.68 + 63 + 34 + 34 =
  15. 15.86 + 43 + 67 + 28 =
  16. 16.49 + 89 + 68 + 11 =
  17. 17.45 + 21 + 79 + 41 =
  18. 18.44 + 81 + 13 + 88 =
  19. 19.28 + 18 + 18 + 42 =
  20. 20.67 + 88 + 13 + 56 =
  21. 21.28 + 29 + 21 + 34 =
  22. 22.58 + 58 + 26 + 27 =
  23. 23.50 + 30 + 26 + 58 =
  24. 24.15 + 11 + 46 + 58 =
  25. 25.22 + 79 + 82 + 36 =
  26. 26.44 + 26 + 21 + 54 =
  27. 27.40 + 81 + 64 + 88 =
  28. 28.20 + 88 + 53 + 23 =
  29. 29.40 + 29 + 26 + 19 =
  30. 30.84 + 74 + 27 + 20 =
  31. 31.38 + 36 + 66 + 17 =
  32. 32.26 + 33 + 80 + 63 =
  33. 33.38 + 78 + 61 + 17 =
  34. 34.23 + 14 + 38 + 49 =
  35. 35.41 + 35 + 13 + 73 =
  36. 36.26 + 58 + 37 + 61 =
  37. 37.19 + 79 + 68 + 79 =
  38. 38.54 + 36 + 25 + 39 =
  39. 39.19 + 73 + 28 + 25 =
  40. 40.45 + 72 + 27 + 58 =

Answer key

  1. 158
  2. 234
  3. 126
  4. 227
  5. 187
  6. 161
  7. 188
  8. 183
  9. 134
  10. 228
  11. 184
  12. 108
  13. 186
  14. 199
  15. 224
  16. 217
  17. 186
  18. 226
  19. 106
  20. 224
  21. 112
  22. 169
  23. 164
  24. 130
  25. 219
  26. 145
  27. 273
  28. 184
  29. 114
  30. 205
  31. 157
  32. 202
  33. 194
  34. 124
  35. 162
  36. 182
  37. 245
  38. 154
  39. 145
  40. 202

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