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Mental Addition Worksheet for Class 2 and 3

Mental maths lesson 6: Add 2-digit numbers left to right · Set 851 · 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. 1.88 + 38 =
  2. 2.30 + 75 =
  3. 3.72 + 87 =
  4. 4.88 + 51 =
  5. 5.77 + 69 =
  6. 6.66 + 58 =
  7. 7.66 + 39 =
  8. 8.70 + 41 =
  9. 9.68 + 51 =
  10. 10.22 + 81 =
  11. 11.41 + 62 =
  12. 12.67 + 21 =
  13. 13.84 + 88 =
  14. 14.71 + 41 =
  15. 15.27 + 14 =
  16. 16.66 + 49 =
  17. 17.21 + 47 =
  18. 18.37 + 68 =
  19. 19.32 + 56 =
  20. 20.52 + 28 =
  21. 21.74 + 17 =
  22. 22.28 + 21 =
  23. 23.73 + 34 =
  24. 24.39 + 25 =
  25. 25.43 + 24 =
  26. 26.66 + 33 =
  27. 27.81 + 44 =
  28. 28.31 + 39 =
  29. 29.52 + 39 =
  30. 30.49 + 56 =
  31. 31.59 + 21 =
  32. 32.32 + 17 =
  33. 33.84 + 22 =
  34. 34.40 + 81 =
  35. 35.40 + 64 =
  36. 36.47 + 23 =
  37. 37.57 + 81 =
  38. 38.73 + 21 =
  39. 39.64 + 24 =
  40. 40.54 + 81 =

Answer key

  1. 126
  2. 105
  3. 159
  4. 139
  5. 146
  6. 124
  7. 105
  8. 111
  9. 119
  10. 103
  11. 103
  12. 88
  13. 172
  14. 112
  15. 41
  16. 115
  17. 68
  18. 105
  19. 88
  20. 80
  21. 91
  22. 49
  23. 107
  24. 64
  25. 67
  26. 99
  27. 125
  28. 70
  29. 91
  30. 105
  31. 80
  32. 49
  33. 106
  34. 121
  35. 104
  36. 70
  37. 138
  38. 94
  39. 88
  40. 135

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