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Mental Addition Worksheet for Class 2 and 3

Mental maths lesson 6: Add 2-digit numbers left to right · Set 23 · 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. 1.32 + 71 =
  2. 2.46 + 12 =
  3. 3.40 + 73 =
  4. 4.83 + 89 =
  5. 5.83 + 44 =
  6. 6.75 + 31 =
  7. 7.26 + 13 =
  8. 8.27 + 39 =
  9. 9.55 + 19 =
  10. 10.44 + 23 =
  11. 11.31 + 52 =
  12. 12.24 + 61 =
  13. 13.46 + 48 =
  14. 14.37 + 27 =
  15. 15.63 + 31 =
  16. 16.34 + 71 =
  17. 17.31 + 38 =
  18. 18.89 + 31 =
  19. 19.36 + 43 =
  20. 20.22 + 84 =
  21. 21.39 + 19 =
  22. 22.61 + 76 =
  23. 23.70 + 56 =
  24. 24.40 + 21 =
  25. 25.41 + 12 =
  26. 26.64 + 59 =
  27. 27.26 + 19 =
  28. 28.23 + 34 =
  29. 29.21 + 47 =
  30. 30.88 + 54 =
  31. 31.65 + 83 =
  32. 32.38 + 87 =
  33. 33.21 + 41 =
  34. 34.21 + 31 =
  35. 35.79 + 51 =
  36. 36.65 + 33 =
  37. 37.45 + 52 =
  38. 38.22 + 68 =
  39. 39.76 + 37 =
  40. 40.56 + 77 =

Answer key

  1. 103
  2. 58
  3. 113
  4. 172
  5. 127
  6. 106
  7. 39
  8. 66
  9. 74
  10. 67
  11. 83
  12. 85
  13. 94
  14. 64
  15. 94
  16. 105
  17. 69
  18. 120
  19. 79
  20. 106
  21. 58
  22. 137
  23. 126
  24. 61
  25. 53
  26. 123
  27. 45
  28. 57
  29. 68
  30. 142
  31. 148
  32. 125
  33. 62
  34. 52
  35. 130
  36. 98
  37. 97
  38. 90
  39. 113
  40. 133

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