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Mental Addition Worksheet for Class 2 and 3

Mental maths lesson 6: Add 2-digit numbers left to right · Set 537 · 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. 1.71 + 21 =
  2. 2.41 + 85 =
  3. 3.34 + 28 =
  4. 4.53 + 43 =
  5. 5.39 + 89 =
  6. 6.35 + 37 =
  7. 7.65 + 61 =
  8. 8.83 + 16 =
  9. 9.36 + 26 =
  10. 10.24 + 34 =
  11. 11.33 + 89 =
  12. 12.23 + 39 =
  13. 13.48 + 35 =
  14. 14.75 + 19 =
  15. 15.26 + 71 =
  16. 16.37 + 22 =
  17. 17.76 + 57 =
  18. 18.54 + 21 =
  19. 19.68 + 84 =
  20. 20.66 + 69 =
  21. 21.21 + 65 =
  22. 22.75 + 48 =
  23. 23.83 + 23 =
  24. 24.50 + 37 =
  25. 25.49 + 21 =
  26. 26.63 + 33 =
  27. 27.73 + 63 =
  28. 28.28 + 25 =
  29. 29.42 + 47 =
  30. 30.33 + 76 =
  31. 31.50 + 71 =
  32. 32.30 + 15 =
  33. 33.37 + 78 =
  34. 34.30 + 57 =
  35. 35.33 + 32 =
  36. 36.87 + 68 =
  37. 37.41 + 25 =
  38. 38.27 + 23 =
  39. 39.57 + 42 =
  40. 40.37 + 74 =

Answer key

  1. 92
  2. 126
  3. 62
  4. 96
  5. 128
  6. 72
  7. 126
  8. 99
  9. 62
  10. 58
  11. 122
  12. 62
  13. 83
  14. 94
  15. 97
  16. 59
  17. 133
  18. 75
  19. 152
  20. 135
  21. 86
  22. 123
  23. 106
  24. 87
  25. 70
  26. 96
  27. 136
  28. 53
  29. 89
  30. 109
  31. 121
  32. 45
  33. 115
  34. 87
  35. 65
  36. 155
  37. 66
  38. 50
  39. 99
  40. 111

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