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Mental Addition Worksheet for Class 2 and 3

Mental maths lesson 6: Add 2-digit numbers left to right · Set 341 · 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. 1.71 + 42 =
  2. 2.27 + 65 =
  3. 3.56 + 84 =
  4. 4.77 + 46 =
  5. 5.55 + 46 =
  6. 6.57 + 78 =
  7. 7.25 + 73 =
  8. 8.89 + 64 =
  9. 9.59 + 63 =
  10. 10.63 + 39 =
  11. 11.42 + 65 =
  12. 12.42 + 24 =
  13. 13.62 + 84 =
  14. 14.75 + 32 =
  15. 15.38 + 27 =
  16. 16.37 + 35 =
  17. 17.59 + 87 =
  18. 18.46 + 79 =
  19. 19.35 + 12 =
  20. 20.81 + 39 =
  21. 21.31 + 69 =
  22. 22.79 + 35 =
  23. 23.42 + 81 =
  24. 24.29 + 25 =
  25. 25.72 + 66 =
  26. 26.24 + 57 =
  27. 27.50 + 46 =
  28. 28.64 + 61 =
  29. 29.38 + 51 =
  30. 30.26 + 51 =
  31. 31.87 + 41 =
  32. 32.77 + 51 =
  33. 33.68 + 31 =
  34. 34.37 + 33 =
  35. 35.21 + 35 =
  36. 36.39 + 81 =
  37. 37.35 + 51 =
  38. 38.51 + 51 =
  39. 39.88 + 22 =
  40. 40.36 + 45 =

Answer key

  1. 113
  2. 92
  3. 140
  4. 123
  5. 101
  6. 135
  7. 98
  8. 153
  9. 122
  10. 102
  11. 107
  12. 66
  13. 146
  14. 107
  15. 65
  16. 72
  17. 146
  18. 125
  19. 47
  20. 120
  21. 100
  22. 114
  23. 123
  24. 54
  25. 138
  26. 81
  27. 96
  28. 125
  29. 89
  30. 77
  31. 128
  32. 128
  33. 99
  34. 70
  35. 56
  36. 120
  37. 86
  38. 102
  39. 110
  40. 81

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