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Mental Addition Worksheet for Class 2 and 3

Mental maths lesson 6: Add 2-digit numbers left to right · Set 983 · 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. 1.21 + 67 =
  2. 2.80 + 55 =
  3. 3.64 + 46 =
  4. 4.53 + 61 =
  5. 5.85 + 41 =
  6. 6.68 + 64 =
  7. 7.24 + 74 =
  8. 8.74 + 47 =
  9. 9.82 + 35 =
  10. 10.31 + 27 =
  11. 11.36 + 47 =
  12. 12.61 + 33 =
  13. 13.39 + 76 =
  14. 14.84 + 31 =
  15. 15.25 + 33 =
  16. 16.22 + 78 =
  17. 17.79 + 31 =
  18. 18.85 + 74 =
  19. 19.34 + 81 =
  20. 20.23 + 63 =
  21. 21.38 + 32 =
  22. 22.58 + 12 =
  23. 23.73 + 31 =
  24. 24.38 + 64 =
  25. 25.35 + 12 =
  26. 26.27 + 85 =
  27. 27.52 + 27 =
  28. 28.75 + 63 =
  29. 29.46 + 33 =
  30. 30.33 + 46 =
  31. 31.48 + 18 =
  32. 32.81 + 63 =
  33. 33.60 + 14 =
  34. 34.41 + 79 =
  35. 35.78 + 51 =
  36. 36.29 + 26 =
  37. 37.73 + 85 =
  38. 38.86 + 65 =
  39. 39.72 + 16 =
  40. 40.63 + 61 =

Answer key

  1. 88
  2. 135
  3. 110
  4. 114
  5. 126
  6. 132
  7. 98
  8. 121
  9. 117
  10. 58
  11. 83
  12. 94
  13. 115
  14. 115
  15. 58
  16. 100
  17. 110
  18. 159
  19. 115
  20. 86
  21. 70
  22. 70
  23. 104
  24. 102
  25. 47
  26. 112
  27. 79
  28. 138
  29. 79
  30. 79
  31. 66
  32. 144
  33. 74
  34. 120
  35. 129
  36. 55
  37. 158
  38. 151
  39. 88
  40. 124

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