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Mental Addition Worksheet for Class 2 and 3

Mental maths lesson 6: Add 2-digit numbers left to right · Set 583 · 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. 1.56 + 51 =
  2. 2.22 + 12 =
  3. 3.45 + 73 =
  4. 4.48 + 51 =
  5. 5.29 + 31 =
  6. 6.68 + 12 =
  7. 7.24 + 29 =
  8. 8.68 + 19 =
  9. 9.32 + 33 =
  10. 10.56 + 66 =
  11. 11.26 + 42 =
  12. 12.64 + 71 =
  13. 13.61 + 89 =
  14. 14.31 + 88 =
  15. 15.55 + 19 =
  16. 16.49 + 29 =
  17. 17.24 + 22 =
  18. 18.43 + 84 =
  19. 19.78 + 42 =
  20. 20.48 + 21 =
  21. 21.79 + 25 =
  22. 22.86 + 67 =
  23. 23.61 + 16 =
  24. 24.69 + 19 =
  25. 25.49 + 19 =
  26. 26.26 + 87 =
  27. 27.21 + 27 =
  28. 28.35 + 85 =
  29. 29.54 + 31 =
  30. 30.38 + 81 =
  31. 31.37 + 45 =
  32. 32.34 + 54 =
  33. 33.71 + 25 =
  34. 34.69 + 13 =
  35. 35.58 + 21 =
  36. 36.35 + 23 =
  37. 37.67 + 45 =
  38. 38.66 + 69 =
  39. 39.21 + 32 =
  40. 40.69 + 12 =

Answer key

  1. 107
  2. 34
  3. 118
  4. 99
  5. 60
  6. 80
  7. 53
  8. 87
  9. 65
  10. 122
  11. 68
  12. 135
  13. 150
  14. 119
  15. 74
  16. 78
  17. 46
  18. 127
  19. 120
  20. 69
  21. 104
  22. 153
  23. 77
  24. 88
  25. 68
  26. 113
  27. 48
  28. 120
  29. 85
  30. 119
  31. 82
  32. 88
  33. 96
  34. 82
  35. 79
  36. 58
  37. 112
  38. 135
  39. 53
  40. 81

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