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Mental Addition Worksheet for Class 2 and 3

Mental maths lesson 6: Add 2-digit numbers left to right · Set 574 · 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. 1.46 + 78 =
  2. 2.30 + 12 =
  3. 3.45 + 35 =
  4. 4.51 + 72 =
  5. 5.65 + 47 =
  6. 6.29 + 85 =
  7. 7.34 + 74 =
  8. 8.78 + 12 =
  9. 9.30 + 16 =
  10. 10.47 + 86 =
  11. 11.29 + 19 =
  12. 12.69 + 41 =
  13. 13.87 + 86 =
  14. 14.76 + 61 =
  15. 15.37 + 42 =
  16. 16.45 + 21 =
  17. 17.52 + 24 =
  18. 18.36 + 18 =
  19. 19.21 + 45 =
  20. 20.52 + 29 =
  21. 21.61 + 81 =
  22. 22.72 + 13 =
  23. 23.41 + 21 =
  24. 24.75 + 84 =
  25. 25.64 + 23 =
  26. 26.27 + 83 =
  27. 27.24 + 66 =
  28. 28.32 + 31 =
  29. 29.31 + 57 =
  30. 30.81 + 47 =
  31. 31.26 + 71 =
  32. 32.75 + 32 =
  33. 33.29 + 13 =
  34. 34.40 + 48 =
  35. 35.80 + 81 =
  36. 36.49 + 59 =
  37. 37.44 + 31 =
  38. 38.56 + 24 =
  39. 39.49 + 75 =
  40. 40.84 + 47 =

Answer key

  1. 124
  2. 42
  3. 80
  4. 123
  5. 112
  6. 114
  7. 108
  8. 90
  9. 46
  10. 133
  11. 48
  12. 110
  13. 173
  14. 137
  15. 79
  16. 66
  17. 76
  18. 54
  19. 66
  20. 81
  21. 142
  22. 85
  23. 62
  24. 159
  25. 87
  26. 110
  27. 90
  28. 63
  29. 88
  30. 128
  31. 97
  32. 107
  33. 42
  34. 88
  35. 161
  36. 108
  37. 75
  38. 80
  39. 124
  40. 131

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