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Mental Addition Worksheet for Class 2 and 3

Mental maths lesson 6: Add 2-digit numbers left to right · Set 376 · 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. 1.38 + 32 =
  2. 2.61 + 42 =
  3. 3.41 + 37 =
  4. 4.24 + 19 =
  5. 5.34 + 64 =
  6. 6.23 + 74 =
  7. 7.58 + 82 =
  8. 8.64 + 75 =
  9. 9.43 + 15 =
  10. 10.38 + 41 =
  11. 11.88 + 71 =
  12. 12.38 + 76 =
  13. 13.77 + 27 =
  14. 14.77 + 46 =
  15. 15.41 + 71 =
  16. 16.49 + 61 =
  17. 17.24 + 21 =
  18. 18.37 + 66 =
  19. 19.72 + 53 =
  20. 20.49 + 46 =
  21. 21.89 + 22 =
  22. 22.40 + 47 =
  23. 23.57 + 63 =
  24. 24.78 + 31 =
  25. 25.28 + 48 =
  26. 26.69 + 33 =
  27. 27.70 + 31 =
  28. 28.46 + 39 =
  29. 29.52 + 56 =
  30. 30.73 + 61 =
  31. 31.48 + 54 =
  32. 32.63 + 65 =
  33. 33.38 + 21 =
  34. 34.37 + 27 =
  35. 35.79 + 61 =
  36. 36.82 + 71 =
  37. 37.40 + 37 =
  38. 38.33 + 61 =
  39. 39.62 + 55 =
  40. 40.28 + 69 =

Answer key

  1. 70
  2. 103
  3. 78
  4. 43
  5. 98
  6. 97
  7. 140
  8. 139
  9. 58
  10. 79
  11. 159
  12. 114
  13. 104
  14. 123
  15. 112
  16. 110
  17. 45
  18. 103
  19. 125
  20. 95
  21. 111
  22. 87
  23. 120
  24. 109
  25. 76
  26. 102
  27. 101
  28. 85
  29. 108
  30. 134
  31. 102
  32. 128
  33. 59
  34. 64
  35. 140
  36. 153
  37. 77
  38. 94
  39. 117
  40. 97

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