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Mental Addition Worksheet for Class 2 and 3

Mental maths lesson 6: Add 2-digit numbers left to right · Set 952 · 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. 1.39 + 51 =
  2. 2.59 + 51 =
  3. 3.86 + 73 =
  4. 4.86 + 68 =
  5. 5.41 + 57 =
  6. 6.81 + 21 =
  7. 7.74 + 55 =
  8. 8.87 + 26 =
  9. 9.63 + 51 =
  10. 10.71 + 81 =
  11. 11.57 + 81 =
  12. 12.49 + 85 =
  13. 13.88 + 41 =
  14. 14.35 + 34 =
  15. 15.76 + 14 =
  16. 16.36 + 46 =
  17. 17.46 + 63 =
  18. 18.22 + 17 =
  19. 19.47 + 31 =
  20. 20.29 + 22 =
  21. 21.81 + 73 =
  22. 22.65 + 23 =
  23. 23.80 + 87 =
  24. 24.84 + 44 =
  25. 25.26 + 47 =
  26. 26.30 + 24 =
  27. 27.26 + 37 =
  28. 28.29 + 74 =
  29. 29.27 + 51 =
  30. 30.36 + 37 =
  31. 31.46 + 32 =
  32. 32.40 + 77 =
  33. 33.27 + 41 =
  34. 34.44 + 81 =
  35. 35.80 + 14 =
  36. 36.53 + 21 =
  37. 37.74 + 14 =
  38. 38.29 + 15 =
  39. 39.38 + 71 =
  40. 40.85 + 16 =

Answer key

  1. 90
  2. 110
  3. 159
  4. 154
  5. 98
  6. 102
  7. 129
  8. 113
  9. 114
  10. 152
  11. 138
  12. 134
  13. 129
  14. 69
  15. 90
  16. 82
  17. 109
  18. 39
  19. 78
  20. 51
  21. 154
  22. 88
  23. 167
  24. 128
  25. 73
  26. 54
  27. 63
  28. 103
  29. 78
  30. 73
  31. 78
  32. 117
  33. 68
  34. 125
  35. 94
  36. 74
  37. 88
  38. 44
  39. 109
  40. 101

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