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Mental Addition Worksheet for Class 2 and 3

Mental maths lesson 6: Add 2-digit numbers left to right · Set 11 · 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. 1.33 + 52 =
  2. 2.48 + 53 =
  3. 3.56 + 18 =
  4. 4.36 + 75 =
  5. 5.87 + 16 =
  6. 6.76 + 36 =
  7. 7.60 + 12 =
  8. 8.56 + 28 =
  9. 9.64 + 15 =
  10. 10.67 + 35 =
  11. 11.28 + 31 =
  12. 12.22 + 59 =
  13. 13.27 + 21 =
  14. 14.54 + 51 =
  15. 15.36 + 28 =
  16. 16.65 + 55 =
  17. 17.38 + 13 =
  18. 18.30 + 86 =
  19. 19.25 + 71 =
  20. 20.48 + 82 =
  21. 21.40 + 69 =
  22. 22.64 + 35 =
  23. 23.78 + 35 =
  24. 24.40 + 84 =
  25. 25.57 + 35 =
  26. 26.49 + 25 =
  27. 27.75 + 31 =
  28. 28.85 + 23 =
  29. 29.24 + 27 =
  30. 30.28 + 26 =
  31. 31.22 + 81 =
  32. 32.62 + 41 =
  33. 33.34 + 36 =
  34. 34.22 + 32 =
  35. 35.42 + 23 =
  36. 36.40 + 31 =
  37. 37.32 + 73 =
  38. 38.28 + 12 =
  39. 39.32 + 75 =
  40. 40.51 + 63 =

Answer key

  1. 85
  2. 101
  3. 74
  4. 111
  5. 103
  6. 112
  7. 72
  8. 84
  9. 79
  10. 102
  11. 59
  12. 81
  13. 48
  14. 105
  15. 64
  16. 120
  17. 51
  18. 116
  19. 96
  20. 130
  21. 109
  22. 99
  23. 113
  24. 124
  25. 92
  26. 74
  27. 106
  28. 108
  29. 51
  30. 54
  31. 103
  32. 103
  33. 70
  34. 54
  35. 65
  36. 71
  37. 105
  38. 40
  39. 107
  40. 114

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