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Mental Addition Worksheet for Class 2 and 3

Mental maths lesson 6: Add 2-digit numbers left to right · Set 875 · 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. 1.62 + 57 =
  2. 2.25 + 58 =
  3. 3.58 + 52 =
  4. 4.35 + 17 =
  5. 5.23 + 17 =
  6. 6.38 + 29 =
  7. 7.69 + 45 =
  8. 8.85 + 21 =
  9. 9.67 + 32 =
  10. 10.22 + 42 =
  11. 11.67 + 29 =
  12. 12.35 + 62 =
  13. 13.44 + 57 =
  14. 14.68 + 22 =
  15. 15.68 + 85 =
  16. 16.40 + 51 =
  17. 17.26 + 57 =
  18. 18.49 + 23 =
  19. 19.81 + 44 =
  20. 20.75 + 53 =
  21. 21.50 + 72 =
  22. 22.38 + 41 =
  23. 23.44 + 14 =
  24. 24.25 + 86 =
  25. 25.29 + 18 =
  26. 26.58 + 88 =
  27. 27.76 + 74 =
  28. 28.40 + 29 =
  29. 29.60 + 54 =
  30. 30.27 + 55 =
  31. 31.77 + 53 =
  32. 32.63 + 41 =
  33. 33.84 + 56 =
  34. 34.28 + 62 =
  35. 35.56 + 75 =
  36. 36.34 + 48 =
  37. 37.74 + 57 =
  38. 38.75 + 21 =
  39. 39.38 + 32 =
  40. 40.64 + 27 =

Answer key

  1. 119
  2. 83
  3. 110
  4. 52
  5. 40
  6. 67
  7. 114
  8. 106
  9. 99
  10. 64
  11. 96
  12. 97
  13. 101
  14. 90
  15. 153
  16. 91
  17. 83
  18. 72
  19. 125
  20. 128
  21. 122
  22. 79
  23. 58
  24. 111
  25. 47
  26. 146
  27. 150
  28. 69
  29. 114
  30. 82
  31. 130
  32. 104
  33. 140
  34. 90
  35. 131
  36. 82
  37. 131
  38. 96
  39. 70
  40. 91

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