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Mental Addition Worksheet for Class 2 and 3

Mental maths lesson 6: Add 2-digit numbers left to right · Set 201 · 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. 1.21 + 69 =
  2. 2.83 + 31 =
  3. 3.46 + 31 =
  4. 4.64 + 43 =
  5. 5.24 + 47 =
  6. 6.46 + 89 =
  7. 7.64 + 66 =
  8. 8.76 + 58 =
  9. 9.74 + 51 =
  10. 10.39 + 81 =
  11. 11.81 + 41 =
  12. 12.46 + 73 =
  13. 13.63 + 28 =
  14. 14.69 + 21 =
  15. 15.74 + 41 =
  16. 16.32 + 15 =
  17. 17.35 + 77 =
  18. 18.32 + 57 =
  19. 19.21 + 79 =
  20. 20.74 + 22 =
  21. 21.49 + 21 =
  22. 22.65 + 13 =
  23. 23.88 + 45 =
  24. 24.74 + 18 =
  25. 25.54 + 49 =
  26. 26.67 + 38 =
  27. 27.36 + 27 =
  28. 28.43 + 44 =
  29. 29.60 + 52 =
  30. 30.85 + 38 =
  31. 31.37 + 42 =
  32. 32.81 + 46 =
  33. 33.48 + 63 =
  34. 34.21 + 54 =
  35. 35.30 + 19 =
  36. 36.42 + 78 =
  37. 37.77 + 47 =
  38. 38.50 + 71 =
  39. 39.83 + 15 =
  40. 40.48 + 41 =

Answer key

  1. 90
  2. 114
  3. 77
  4. 107
  5. 71
  6. 135
  7. 130
  8. 134
  9. 125
  10. 120
  11. 122
  12. 119
  13. 91
  14. 90
  15. 115
  16. 47
  17. 112
  18. 89
  19. 100
  20. 96
  21. 70
  22. 78
  23. 133
  24. 92
  25. 103
  26. 105
  27. 63
  28. 87
  29. 112
  30. 123
  31. 79
  32. 127
  33. 111
  34. 75
  35. 49
  36. 120
  37. 124
  38. 121
  39. 98
  40. 89

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