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Mental Addition Worksheet for Class 2 and 3

Mental maths lesson 6: Add 2-digit numbers left to right · Set 932 · 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. 1.81 + 69 =
  2. 2.46 + 21 =
  3. 3.47 + 55 =
  4. 4.72 + 72 =
  5. 5.34 + 79 =
  6. 6.26 + 49 =
  7. 7.22 + 75 =
  8. 8.55 + 61 =
  9. 9.57 + 69 =
  10. 10.26 + 42 =
  11. 11.34 + 16 =
  12. 12.39 + 26 =
  13. 13.56 + 51 =
  14. 14.36 + 42 =
  15. 15.44 + 26 =
  16. 16.40 + 22 =
  17. 17.52 + 77 =
  18. 18.66 + 89 =
  19. 19.51 + 25 =
  20. 20.40 + 86 =
  21. 21.37 + 39 =
  22. 22.40 + 69 =
  23. 23.74 + 85 =
  24. 24.45 + 35 =
  25. 25.74 + 78 =
  26. 26.46 + 59 =
  27. 27.76 + 28 =
  28. 28.85 + 74 =
  29. 29.48 + 51 =
  30. 30.31 + 55 =
  31. 31.24 + 12 =
  32. 32.85 + 89 =
  33. 33.26 + 44 =
  34. 34.83 + 65 =
  35. 35.59 + 88 =
  36. 36.22 + 29 =
  37. 37.52 + 85 =
  38. 38.35 + 18 =
  39. 39.81 + 79 =
  40. 40.58 + 23 =

Answer key

  1. 150
  2. 67
  3. 102
  4. 144
  5. 113
  6. 75
  7. 97
  8. 116
  9. 126
  10. 68
  11. 50
  12. 65
  13. 107
  14. 78
  15. 70
  16. 62
  17. 129
  18. 155
  19. 76
  20. 126
  21. 76
  22. 109
  23. 159
  24. 80
  25. 152
  26. 105
  27. 104
  28. 159
  29. 99
  30. 86
  31. 36
  32. 174
  33. 70
  34. 148
  35. 147
  36. 51
  37. 137
  38. 53
  39. 160
  40. 81

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