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Mental Addition Worksheet for Class 2 and 3

Mental maths lesson 6: Add 2-digit numbers left to right · Set 83 · 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. 1.55 + 16 =
  2. 2.66 + 49 =
  3. 3.36 + 87 =
  4. 4.45 + 46 =
  5. 5.83 + 22 =
  6. 6.32 + 79 =
  7. 7.68 + 61 =
  8. 8.45 + 44 =
  9. 9.53 + 33 =
  10. 10.28 + 22 =
  11. 11.40 + 51 =
  12. 12.76 + 38 =
  13. 13.35 + 32 =
  14. 14.78 + 72 =
  15. 15.32 + 58 =
  16. 16.70 + 14 =
  17. 17.56 + 71 =
  18. 18.26 + 18 =
  19. 19.35 + 23 =
  20. 20.23 + 58 =
  21. 21.71 + 28 =
  22. 22.24 + 87 =
  23. 23.27 + 88 =
  24. 24.89 + 14 =
  25. 25.41 + 72 =
  26. 26.48 + 58 =
  27. 27.87 + 46 =
  28. 28.31 + 54 =
  29. 29.34 + 65 =
  30. 30.27 + 16 =
  31. 31.43 + 72 =
  32. 32.21 + 79 =
  33. 33.49 + 33 =
  34. 34.26 + 61 =
  35. 35.28 + 29 =
  36. 36.58 + 71 =
  37. 37.57 + 31 =
  38. 38.37 + 47 =
  39. 39.76 + 27 =
  40. 40.39 + 73 =

Answer key

  1. 71
  2. 115
  3. 123
  4. 91
  5. 105
  6. 111
  7. 129
  8. 89
  9. 86
  10. 50
  11. 91
  12. 114
  13. 67
  14. 150
  15. 90
  16. 84
  17. 127
  18. 44
  19. 58
  20. 81
  21. 99
  22. 111
  23. 115
  24. 103
  25. 113
  26. 106
  27. 133
  28. 85
  29. 99
  30. 43
  31. 115
  32. 100
  33. 82
  34. 87
  35. 57
  36. 129
  37. 88
  38. 84
  39. 103
  40. 112

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