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Mental Addition Worksheet for Class 2 and 3

Mental maths lesson 6: Add 2-digit numbers left to right · Set 849 · 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. 1.34 + 38 =
  2. 2.73 + 21 =
  3. 3.36 + 28 =
  4. 4.24 + 21 =
  5. 5.57 + 49 =
  6. 6.75 + 53 =
  7. 7.48 + 81 =
  8. 8.22 + 85 =
  9. 9.42 + 24 =
  10. 10.42 + 79 =
  11. 11.89 + 28 =
  12. 12.45 + 26 =
  13. 13.39 + 15 =
  14. 14.80 + 51 =
  15. 15.89 + 76 =
  16. 16.48 + 67 =
  17. 17.85 + 41 =
  18. 18.33 + 21 =
  19. 19.32 + 18 =
  20. 20.31 + 57 =
  21. 21.82 + 23 =
  22. 22.46 + 54 =
  23. 23.33 + 71 =
  24. 24.67 + 88 =
  25. 25.50 + 18 =
  26. 26.73 + 55 =
  27. 27.27 + 88 =
  28. 28.37 + 73 =
  29. 29.44 + 19 =
  30. 30.61 + 66 =
  31. 31.64 + 29 =
  32. 32.64 + 26 =
  33. 33.63 + 44 =
  34. 34.44 + 85 =
  35. 35.31 + 34 =
  36. 36.66 + 66 =
  37. 37.40 + 28 =
  38. 38.84 + 73 =
  39. 39.71 + 57 =
  40. 40.69 + 61 =

Answer key

  1. 72
  2. 94
  3. 64
  4. 45
  5. 106
  6. 128
  7. 129
  8. 107
  9. 66
  10. 121
  11. 117
  12. 71
  13. 54
  14. 131
  15. 165
  16. 115
  17. 126
  18. 54
  19. 50
  20. 88
  21. 105
  22. 100
  23. 104
  24. 155
  25. 68
  26. 128
  27. 115
  28. 110
  29. 63
  30. 127
  31. 93
  32. 90
  33. 107
  34. 129
  35. 65
  36. 132
  37. 68
  38. 157
  39. 128
  40. 130

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