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Mental Addition Worksheet for Class 2 and 3

Mental maths lesson 6: Add 2-digit numbers left to right · Set 543 · 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. 1.42 + 24 =
  2. 2.74 + 27 =
  3. 3.65 + 61 =
  4. 4.84 + 66 =
  5. 5.88 + 55 =
  6. 6.83 + 61 =
  7. 7.69 + 68 =
  8. 8.50 + 84 =
  9. 9.28 + 71 =
  10. 10.41 + 61 =
  11. 11.55 + 26 =
  12. 12.54 + 13 =
  13. 13.26 + 29 =
  14. 14.69 + 21 =
  15. 15.46 + 36 =
  16. 16.68 + 61 =
  17. 17.78 + 32 =
  18. 18.28 + 48 =
  19. 19.74 + 13 =
  20. 20.83 + 15 =
  21. 21.37 + 78 =
  22. 22.31 + 86 =
  23. 23.44 + 25 =
  24. 24.55 + 31 =
  25. 25.84 + 58 =
  26. 26.67 + 89 =
  27. 27.56 + 59 =
  28. 28.62 + 56 =
  29. 29.58 + 75 =
  30. 30.24 + 72 =
  31. 31.37 + 21 =
  32. 32.22 + 41 =
  33. 33.44 + 36 =
  34. 34.48 + 43 =
  35. 35.76 + 63 =
  36. 36.29 + 23 =
  37. 37.31 + 85 =
  38. 38.40 + 59 =
  39. 39.43 + 19 =
  40. 40.49 + 27 =

Answer key

  1. 66
  2. 101
  3. 126
  4. 150
  5. 143
  6. 144
  7. 137
  8. 134
  9. 99
  10. 102
  11. 81
  12. 67
  13. 55
  14. 90
  15. 82
  16. 129
  17. 110
  18. 76
  19. 87
  20. 98
  21. 115
  22. 117
  23. 69
  24. 86
  25. 142
  26. 156
  27. 115
  28. 118
  29. 133
  30. 96
  31. 58
  32. 63
  33. 80
  34. 91
  35. 139
  36. 52
  37. 116
  38. 99
  39. 62
  40. 76

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