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Mental Addition Worksheet for Class 2 and 3

Mental maths lesson 6: Add 2-digit numbers left to right · Set 521 · 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. 1.32 + 39 =
  2. 2.38 + 48 =
  3. 3.50 + 25 =
  4. 4.23 + 48 =
  5. 5.39 + 71 =
  6. 6.64 + 33 =
  7. 7.67 + 62 =
  8. 8.24 + 28 =
  9. 9.80 + 48 =
  10. 10.31 + 43 =
  11. 11.34 + 76 =
  12. 12.43 + 85 =
  13. 13.83 + 75 =
  14. 14.40 + 16 =
  15. 15.44 + 43 =
  16. 16.32 + 33 =
  17. 17.36 + 61 =
  18. 18.65 + 86 =
  19. 19.29 + 34 =
  20. 20.24 + 46 =
  21. 21.46 + 53 =
  22. 22.37 + 62 =
  23. 23.28 + 41 =
  24. 24.65 + 61 =
  25. 25.67 + 57 =
  26. 26.47 + 58 =
  27. 27.25 + 41 =
  28. 28.54 + 33 =
  29. 29.50 + 63 =
  30. 30.37 + 88 =
  31. 31.65 + 47 =
  32. 32.34 + 64 =
  33. 33.28 + 61 =
  34. 34.24 + 27 =
  35. 35.77 + 48 =
  36. 36.46 + 81 =
  37. 37.69 + 44 =
  38. 38.61 + 88 =
  39. 39.38 + 22 =
  40. 40.35 + 31 =

Answer key

  1. 71
  2. 86
  3. 75
  4. 71
  5. 110
  6. 97
  7. 129
  8. 52
  9. 128
  10. 74
  11. 110
  12. 128
  13. 158
  14. 56
  15. 87
  16. 65
  17. 97
  18. 151
  19. 63
  20. 70
  21. 99
  22. 99
  23. 69
  24. 126
  25. 124
  26. 105
  27. 66
  28. 87
  29. 113
  30. 125
  31. 112
  32. 98
  33. 89
  34. 51
  35. 125
  36. 127
  37. 113
  38. 149
  39. 60
  40. 66

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