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Mental Addition Worksheet for Class 2 and 3

Mental maths lesson 6: Add 2-digit numbers left to right · Set 687 · 40 questions
TalentJR

How to do it in your head (Tens first): Keep the first number as it is. Add the tens of the second number. Add the ones.

NameDateTime takenScore ___ / 40
  1. 1.85 + 12 =
  2. 2.26 + 12 =
  3. 3.22 + 71 =
  4. 4.63 + 74 =
  5. 5.67 + 67 =
  6. 6.42 + 51 =
  7. 7.26 + 25 =
  8. 8.80 + 13 =
  9. 9.80 + 57 =
  10. 10.38 + 71 =
  11. 11.37 + 19 =
  12. 12.63 + 69 =
  13. 13.54 + 84 =
  14. 14.51 + 88 =
  15. 15.76 + 57 =
  16. 16.27 + 34 =
  17. 17.81 + 33 =
  18. 18.77 + 29 =
  19. 19.65 + 78 =
  20. 20.31 + 22 =
  21. 21.70 + 51 =
  22. 22.29 + 75 =
  23. 23.46 + 52 =
  24. 24.52 + 52 =
  25. 25.32 + 67 =
  26. 26.68 + 74 =
  27. 27.75 + 88 =
  28. 28.48 + 25 =
  29. 29.60 + 89 =
  30. 30.53 + 35 =
  31. 31.34 + 17 =
  32. 32.37 + 37 =
  33. 33.65 + 69 =
  34. 34.67 + 15 =
  35. 35.79 + 54 =
  36. 36.69 + 77 =
  37. 37.26 + 49 =
  38. 38.28 + 32 =
  39. 39.67 + 12 =
  40. 40.62 + 49 =

Answer key

  1. 97
  2. 38
  3. 93
  4. 137
  5. 134
  6. 93
  7. 51
  8. 93
  9. 137
  10. 109
  11. 56
  12. 132
  13. 138
  14. 139
  15. 133
  16. 61
  17. 114
  18. 106
  19. 143
  20. 53
  21. 121
  22. 104
  23. 98
  24. 104
  25. 99
  26. 142
  27. 163
  28. 73
  29. 149
  30. 88
  31. 51
  32. 74
  33. 134
  34. 82
  35. 133
  36. 146
  37. 75
  38. 60
  39. 79
  40. 111

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