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Mental Addition Worksheet for Class 2 and 3

Mental maths lesson 6: Add 2-digit numbers left to right · Set 967 · 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. 1.35 + 51 =
  2. 2.72 + 63 =
  3. 3.35 + 79 =
  4. 4.59 + 85 =
  5. 5.43 + 21 =
  6. 6.33 + 12 =
  7. 7.69 + 41 =
  8. 8.22 + 29 =
  9. 9.51 + 61 =
  10. 10.73 + 31 =
  11. 11.68 + 37 =
  12. 12.45 + 58 =
  13. 13.89 + 41 =
  14. 14.38 + 78 =
  15. 15.47 + 49 =
  16. 16.74 + 27 =
  17. 17.53 + 61 =
  18. 18.54 + 23 =
  19. 19.24 + 71 =
  20. 20.33 + 22 =
  21. 21.81 + 52 =
  22. 22.78 + 88 =
  23. 23.56 + 51 =
  24. 24.89 + 35 =
  25. 25.54 + 56 =
  26. 26.33 + 52 =
  27. 27.24 + 57 =
  28. 28.68 + 23 =
  29. 29.37 + 68 =
  30. 30.21 + 57 =
  31. 31.41 + 69 =
  32. 32.35 + 34 =
  33. 33.30 + 22 =
  34. 34.50 + 72 =
  35. 35.34 + 46 =
  36. 36.52 + 16 =
  37. 37.42 + 61 =
  38. 38.25 + 51 =
  39. 39.25 + 84 =
  40. 40.24 + 81 =

Answer key

  1. 86
  2. 135
  3. 114
  4. 144
  5. 64
  6. 45
  7. 110
  8. 51
  9. 112
  10. 104
  11. 105
  12. 103
  13. 130
  14. 116
  15. 96
  16. 101
  17. 114
  18. 77
  19. 95
  20. 55
  21. 133
  22. 166
  23. 107
  24. 124
  25. 110
  26. 85
  27. 81
  28. 91
  29. 105
  30. 78
  31. 110
  32. 69
  33. 52
  34. 122
  35. 80
  36. 68
  37. 103
  38. 76
  39. 109
  40. 105

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