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Mental Addition Worksheet for Class 2 and 3

Mental maths lesson 6: Add 2-digit numbers left to right · Set 845 · 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. 1.69 + 61 =
  2. 2.37 + 27 =
  3. 3.43 + 57 =
  4. 4.78 + 44 =
  5. 5.38 + 74 =
  6. 6.57 + 19 =
  7. 7.88 + 69 =
  8. 8.25 + 28 =
  9. 9.36 + 34 =
  10. 10.54 + 62 =
  11. 11.36 + 67 =
  12. 12.32 + 33 =
  13. 13.81 + 43 =
  14. 14.73 + 46 =
  15. 15.40 + 58 =
  16. 16.55 + 88 =
  17. 17.61 + 79 =
  18. 18.56 + 73 =
  19. 19.82 + 61 =
  20. 20.46 + 19 =
  21. 21.62 + 53 =
  22. 22.40 + 67 =
  23. 23.86 + 21 =
  24. 24.30 + 42 =
  25. 25.23 + 81 =
  26. 26.40 + 12 =
  27. 27.21 + 78 =
  28. 28.38 + 75 =
  29. 29.24 + 16 =
  30. 30.24 + 85 =
  31. 31.86 + 66 =
  32. 32.73 + 39 =
  33. 33.38 + 69 =
  34. 34.64 + 32 =
  35. 35.31 + 61 =
  36. 36.74 + 77 =
  37. 37.67 + 63 =
  38. 38.36 + 88 =
  39. 39.83 + 85 =
  40. 40.29 + 44 =

Answer key

  1. 130
  2. 64
  3. 100
  4. 122
  5. 112
  6. 76
  7. 157
  8. 53
  9. 70
  10. 116
  11. 103
  12. 65
  13. 124
  14. 119
  15. 98
  16. 143
  17. 140
  18. 129
  19. 143
  20. 65
  21. 115
  22. 107
  23. 107
  24. 72
  25. 104
  26. 52
  27. 99
  28. 113
  29. 40
  30. 109
  31. 152
  32. 112
  33. 107
  34. 96
  35. 92
  36. 151
  37. 130
  38. 124
  39. 168
  40. 73

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