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Mental Addition Worksheet for Class 2 and 3

Mental maths lesson 6: Add 2-digit numbers left to right · Set 693 · 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. 1.36 + 76 =
  2. 2.40 + 62 =
  3. 3.70 + 39 =
  4. 4.75 + 53 =
  5. 5.72 + 52 =
  6. 6.27 + 17 =
  7. 7.52 + 25 =
  8. 8.79 + 12 =
  9. 9.67 + 88 =
  10. 10.26 + 13 =
  11. 11.23 + 79 =
  12. 12.83 + 73 =
  13. 13.34 + 51 =
  14. 14.67 + 68 =
  15. 15.81 + 29 =
  16. 16.47 + 43 =
  17. 17.39 + 69 =
  18. 18.44 + 66 =
  19. 19.32 + 17 =
  20. 20.74 + 47 =
  21. 21.31 + 56 =
  22. 22.28 + 38 =
  23. 23.75 + 74 =
  24. 24.85 + 65 =
  25. 25.37 + 74 =
  26. 26.67 + 75 =
  27. 27.87 + 13 =
  28. 28.64 + 16 =
  29. 29.69 + 28 =
  30. 30.50 + 76 =
  31. 31.39 + 41 =
  32. 32.85 + 64 =
  33. 33.32 + 85 =
  34. 34.63 + 21 =
  35. 35.51 + 77 =
  36. 36.27 + 61 =
  37. 37.67 + 63 =
  38. 38.48 + 39 =
  39. 39.52 + 78 =
  40. 40.24 + 67 =

Answer key

  1. 112
  2. 102
  3. 109
  4. 128
  5. 124
  6. 44
  7. 77
  8. 91
  9. 155
  10. 39
  11. 102
  12. 156
  13. 85
  14. 135
  15. 110
  16. 90
  17. 108
  18. 110
  19. 49
  20. 121
  21. 87
  22. 66
  23. 149
  24. 150
  25. 111
  26. 142
  27. 100
  28. 80
  29. 97
  30. 126
  31. 80
  32. 149
  33. 117
  34. 84
  35. 128
  36. 88
  37. 130
  38. 87
  39. 130
  40. 91

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