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Mental Addition Worksheet for Class 2 and 3

Mental maths lesson 6: Add 2-digit numbers left to right · Set 644 · 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. 1.34 + 15 =
  2. 2.29 + 74 =
  3. 3.64 + 38 =
  4. 4.33 + 47 =
  5. 5.35 + 38 =
  6. 6.74 + 27 =
  7. 7.21 + 75 =
  8. 8.79 + 49 =
  9. 9.66 + 35 =
  10. 10.56 + 62 =
  11. 11.80 + 17 =
  12. 12.27 + 34 =
  13. 13.31 + 56 =
  14. 14.25 + 71 =
  15. 15.48 + 29 =
  16. 16.48 + 37 =
  17. 17.44 + 32 =
  18. 18.67 + 17 =
  19. 19.69 + 45 =
  20. 20.78 + 24 =
  21. 21.64 + 19 =
  22. 22.58 + 72 =
  23. 23.83 + 31 =
  24. 24.42 + 24 =
  25. 25.88 + 65 =
  26. 26.77 + 23 =
  27. 27.23 + 31 =
  28. 28.34 + 37 =
  29. 29.24 + 44 =
  30. 30.28 + 67 =
  31. 31.35 + 87 =
  32. 32.37 + 35 =
  33. 33.50 + 87 =
  34. 34.79 + 18 =
  35. 35.22 + 67 =
  36. 36.83 + 21 =
  37. 37.31 + 15 =
  38. 38.76 + 76 =
  39. 39.63 + 24 =
  40. 40.48 + 73 =

Answer key

  1. 49
  2. 103
  3. 102
  4. 80
  5. 73
  6. 101
  7. 96
  8. 128
  9. 101
  10. 118
  11. 97
  12. 61
  13. 87
  14. 96
  15. 77
  16. 85
  17. 76
  18. 84
  19. 114
  20. 102
  21. 83
  22. 130
  23. 114
  24. 66
  25. 153
  26. 100
  27. 54
  28. 71
  29. 68
  30. 95
  31. 122
  32. 72
  33. 137
  34. 97
  35. 89
  36. 104
  37. 46
  38. 152
  39. 87
  40. 121

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