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Mental Addition Worksheet for Class 2 and 3

Mental maths lesson 6: Add 2-digit numbers left to right · Set 79 · 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. 1.51 + 46 =
  2. 2.32 + 85 =
  3. 3.70 + 35 =
  4. 4.41 + 55 =
  5. 5.42 + 83 =
  6. 6.69 + 81 =
  7. 7.25 + 66 =
  8. 8.50 + 47 =
  9. 9.30 + 35 =
  10. 10.34 + 42 =
  11. 11.79 + 55 =
  12. 12.78 + 21 =
  13. 13.72 + 58 =
  14. 14.47 + 22 =
  15. 15.56 + 16 =
  16. 16.24 + 77 =
  17. 17.26 + 66 =
  18. 18.65 + 12 =
  19. 19.25 + 67 =
  20. 20.37 + 42 =
  21. 21.78 + 56 =
  22. 22.43 + 71 =
  23. 23.87 + 31 =
  24. 24.27 + 21 =
  25. 25.64 + 39 =
  26. 26.74 + 16 =
  27. 27.76 + 29 =
  28. 28.79 + 31 =
  29. 29.49 + 83 =
  30. 30.49 + 86 =
  31. 31.57 + 85 =
  32. 32.28 + 31 =
  33. 33.64 + 16 =
  34. 34.22 + 81 =
  35. 35.47 + 17 =
  36. 36.45 + 81 =
  37. 37.39 + 56 =
  38. 38.34 + 57 =
  39. 39.63 + 36 =
  40. 40.51 + 77 =

Answer key

  1. 97
  2. 117
  3. 105
  4. 96
  5. 125
  6. 150
  7. 91
  8. 97
  9. 65
  10. 76
  11. 134
  12. 99
  13. 130
  14. 69
  15. 72
  16. 101
  17. 92
  18. 77
  19. 92
  20. 79
  21. 134
  22. 114
  23. 118
  24. 48
  25. 103
  26. 90
  27. 105
  28. 110
  29. 132
  30. 135
  31. 142
  32. 59
  33. 80
  34. 103
  35. 64
  36. 126
  37. 95
  38. 91
  39. 99
  40. 128

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