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Mental Addition Worksheet for Class 2 and 3

Mental maths lesson 6: Add 2-digit numbers left to right · Set 956 · 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. 1.75 + 29 =
  2. 2.81 + 43 =
  3. 3.50 + 67 =
  4. 4.67 + 66 =
  5. 5.64 + 29 =
  6. 6.55 + 74 =
  7. 7.22 + 69 =
  8. 8.59 + 58 =
  9. 9.77 + 37 =
  10. 10.42 + 55 =
  11. 11.24 + 45 =
  12. 12.63 + 38 =
  13. 13.53 + 21 =
  14. 14.84 + 88 =
  15. 15.57 + 15 =
  16. 16.22 + 81 =
  17. 17.23 + 31 =
  18. 18.42 + 87 =
  19. 19.57 + 59 =
  20. 20.24 + 55 =
  21. 21.42 + 21 =
  22. 22.71 + 61 =
  23. 23.39 + 81 =
  24. 24.23 + 41 =
  25. 25.67 + 55 =
  26. 26.87 + 82 =
  27. 27.58 + 22 =
  28. 28.73 + 46 =
  29. 29.76 + 21 =
  30. 30.33 + 29 =
  31. 31.48 + 78 =
  32. 32.73 + 89 =
  33. 33.38 + 42 =
  34. 34.57 + 47 =
  35. 35.73 + 36 =
  36. 36.33 + 66 =
  37. 37.59 + 17 =
  38. 38.76 + 38 =
  39. 39.51 + 17 =
  40. 40.45 + 46 =

Answer key

  1. 104
  2. 124
  3. 117
  4. 133
  5. 93
  6. 129
  7. 91
  8. 117
  9. 114
  10. 97
  11. 69
  12. 101
  13. 74
  14. 172
  15. 72
  16. 103
  17. 54
  18. 129
  19. 116
  20. 79
  21. 63
  22. 132
  23. 120
  24. 64
  25. 122
  26. 169
  27. 80
  28. 119
  29. 97
  30. 62
  31. 126
  32. 162
  33. 80
  34. 104
  35. 109
  36. 99
  37. 76
  38. 114
  39. 68
  40. 91

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