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Mental Addition Worksheet for Class 2 and 3

Mental maths lesson 6: Add 2-digit numbers left to right · Set 472 · 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. 1.44 + 81 =
  2. 2.21 + 73 =
  3. 3.42 + 26 =
  4. 4.51 + 13 =
  5. 5.33 + 16 =
  6. 6.79 + 12 =
  7. 7.34 + 67 =
  8. 8.40 + 58 =
  9. 9.26 + 39 =
  10. 10.23 + 28 =
  11. 11.22 + 78 =
  12. 12.39 + 17 =
  13. 13.86 + 59 =
  14. 14.35 + 34 =
  15. 15.66 + 52 =
  16. 16.38 + 28 =
  17. 17.39 + 89 =
  18. 18.87 + 37 =
  19. 19.38 + 35 =
  20. 20.42 + 55 =
  21. 21.27 + 41 =
  22. 22.62 + 26 =
  23. 23.30 + 37 =
  24. 24.58 + 71 =
  25. 25.48 + 78 =
  26. 26.23 + 86 =
  27. 27.38 + 45 =
  28. 28.74 + 13 =
  29. 29.62 + 29 =
  30. 30.69 + 29 =
  31. 31.23 + 31 =
  32. 32.35 + 64 =
  33. 33.33 + 51 =
  34. 34.47 + 51 =
  35. 35.26 + 15 =
  36. 36.44 + 34 =
  37. 37.25 + 41 =
  38. 38.41 + 63 =
  39. 39.40 + 76 =
  40. 40.30 + 38 =

Answer key

  1. 125
  2. 94
  3. 68
  4. 64
  5. 49
  6. 91
  7. 101
  8. 98
  9. 65
  10. 51
  11. 100
  12. 56
  13. 145
  14. 69
  15. 118
  16. 66
  17. 128
  18. 124
  19. 73
  20. 97
  21. 68
  22. 88
  23. 67
  24. 129
  25. 126
  26. 109
  27. 83
  28. 87
  29. 91
  30. 98
  31. 54
  32. 99
  33. 84
  34. 98
  35. 41
  36. 78
  37. 66
  38. 104
  39. 116
  40. 68

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