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Mental Addition Worksheet for Class 2 and 3

Mental maths lesson 6: Add 2-digit numbers left to right · Set 531 · 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. 1.22 + 24 =
  2. 2.68 + 79 =
  3. 3.58 + 88 =
  4. 4.29 + 76 =
  5. 5.43 + 25 =
  6. 6.31 + 72 =
  7. 7.37 + 88 =
  8. 8.67 + 26 =
  9. 9.25 + 63 =
  10. 10.73 + 31 =
  11. 11.28 + 24 =
  12. 12.88 + 77 =
  13. 13.78 + 68 =
  14. 14.33 + 42 =
  15. 15.78 + 24 =
  16. 16.52 + 54 =
  17. 17.58 + 25 =
  18. 18.33 + 72 =
  19. 19.48 + 59 =
  20. 20.39 + 51 =
  21. 21.36 + 26 =
  22. 22.81 + 72 =
  23. 23.53 + 58 =
  24. 24.39 + 49 =
  25. 25.32 + 56 =
  26. 26.27 + 46 =
  27. 27.57 + 59 =
  28. 28.27 + 13 =
  29. 29.34 + 21 =
  30. 30.40 + 47 =
  31. 31.43 + 75 =
  32. 32.44 + 38 =
  33. 33.40 + 83 =
  34. 34.26 + 87 =
  35. 35.47 + 79 =
  36. 36.35 + 28 =
  37. 37.21 + 13 =
  38. 38.83 + 24 =
  39. 39.27 + 79 =
  40. 40.64 + 14 =

Answer key

  1. 46
  2. 147
  3. 146
  4. 105
  5. 68
  6. 103
  7. 125
  8. 93
  9. 88
  10. 104
  11. 52
  12. 165
  13. 146
  14. 75
  15. 102
  16. 106
  17. 83
  18. 105
  19. 107
  20. 90
  21. 62
  22. 153
  23. 111
  24. 88
  25. 88
  26. 73
  27. 116
  28. 40
  29. 55
  30. 87
  31. 118
  32. 82
  33. 123
  34. 113
  35. 126
  36. 63
  37. 34
  38. 107
  39. 106
  40. 78

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