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Mental Addition Worksheet for Class 2 and 3

Mental maths lesson 6: Add 2-digit numbers left to right · Set 923 · 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. 1.78 + 34 =
  2. 2.23 + 55 =
  3. 3.52 + 24 =
  4. 4.43 + 16 =
  5. 5.53 + 25 =
  6. 6.75 + 63 =
  7. 7.62 + 21 =
  8. 8.61 + 18 =
  9. 9.45 + 67 =
  10. 10.36 + 76 =
  11. 11.61 + 69 =
  12. 12.32 + 61 =
  13. 13.71 + 88 =
  14. 14.34 + 87 =
  15. 15.44 + 56 =
  16. 16.41 + 73 =
  17. 17.45 + 65 =
  18. 18.70 + 61 =
  19. 19.42 + 13 =
  20. 20.49 + 51 =
  21. 21.82 + 64 =
  22. 22.69 + 79 =
  23. 23.27 + 29 =
  24. 24.83 + 54 =
  25. 25.86 + 37 =
  26. 26.73 + 35 =
  27. 27.56 + 51 =
  28. 28.51 + 21 =
  29. 29.31 + 38 =
  30. 30.71 + 32 =
  31. 31.44 + 86 =
  32. 32.55 + 88 =
  33. 33.48 + 24 =
  34. 34.56 + 81 =
  35. 35.50 + 88 =
  36. 36.76 + 57 =
  37. 37.48 + 26 =
  38. 38.79 + 59 =
  39. 39.35 + 64 =
  40. 40.76 + 75 =

Answer key

  1. 112
  2. 78
  3. 76
  4. 59
  5. 78
  6. 138
  7. 83
  8. 79
  9. 112
  10. 112
  11. 130
  12. 93
  13. 159
  14. 121
  15. 100
  16. 114
  17. 110
  18. 131
  19. 55
  20. 100
  21. 146
  22. 148
  23. 56
  24. 137
  25. 123
  26. 108
  27. 107
  28. 72
  29. 69
  30. 103
  31. 130
  32. 143
  33. 72
  34. 137
  35. 138
  36. 133
  37. 74
  38. 138
  39. 99
  40. 151

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