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Mental Addition Worksheet for Class 2 and 3

Mental maths lesson 6: Add 2-digit numbers left to right · Set 806 · 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. 1.63 + 66 =
  2. 2.45 + 34 =
  3. 3.22 + 63 =
  4. 4.65 + 17 =
  5. 5.48 + 88 =
  6. 6.69 + 78 =
  7. 7.21 + 15 =
  8. 8.36 + 37 =
  9. 9.30 + 59 =
  10. 10.58 + 66 =
  11. 11.68 + 61 =
  12. 12.21 + 34 =
  13. 13.67 + 59 =
  14. 14.33 + 43 =
  15. 15.58 + 85 =
  16. 16.53 + 31 =
  17. 17.63 + 53 =
  18. 18.88 + 52 =
  19. 19.34 + 44 =
  20. 20.58 + 37 =
  21. 21.85 + 55 =
  22. 22.23 + 81 =
  23. 23.49 + 35 =
  24. 24.28 + 12 =
  25. 25.79 + 12 =
  26. 26.73 + 28 =
  27. 27.78 + 22 =
  28. 28.61 + 21 =
  29. 29.87 + 44 =
  30. 30.22 + 85 =
  31. 31.29 + 51 =
  32. 32.48 + 51 =
  33. 33.37 + 83 =
  34. 34.38 + 51 =
  35. 35.53 + 24 =
  36. 36.44 + 13 =
  37. 37.78 + 18 =
  38. 38.48 + 21 =
  39. 39.83 + 15 =
  40. 40.31 + 45 =

Answer key

  1. 129
  2. 79
  3. 85
  4. 82
  5. 136
  6. 147
  7. 36
  8. 73
  9. 89
  10. 124
  11. 129
  12. 55
  13. 126
  14. 76
  15. 143
  16. 84
  17. 116
  18. 140
  19. 78
  20. 95
  21. 140
  22. 104
  23. 84
  24. 40
  25. 91
  26. 101
  27. 100
  28. 82
  29. 131
  30. 107
  31. 80
  32. 99
  33. 120
  34. 89
  35. 77
  36. 57
  37. 96
  38. 69
  39. 98
  40. 76

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