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Mental Addition Worksheet for Class 2 and 3

Mental maths lesson 6: Add 2-digit numbers left to right · Set 248 · 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. 1.56 + 21 =
  2. 2.40 + 61 =
  3. 3.29 + 34 =
  4. 4.80 + 44 =
  5. 5.34 + 29 =
  6. 6.72 + 48 =
  7. 7.57 + 41 =
  8. 8.33 + 82 =
  9. 9.86 + 48 =
  10. 10.32 + 72 =
  11. 11.71 + 48 =
  12. 12.46 + 23 =
  13. 13.56 + 14 =
  14. 14.65 + 13 =
  15. 15.83 + 12 =
  16. 16.44 + 21 =
  17. 17.52 + 62 =
  18. 18.60 + 43 =
  19. 19.62 + 73 =
  20. 20.78 + 18 =
  21. 21.55 + 42 =
  22. 22.62 + 46 =
  23. 23.85 + 14 =
  24. 24.64 + 81 =
  25. 25.69 + 72 =
  26. 26.24 + 67 =
  27. 27.45 + 63 =
  28. 28.26 + 55 =
  29. 29.30 + 81 =
  30. 30.52 + 41 =
  31. 31.32 + 21 =
  32. 32.71 + 83 =
  33. 33.40 + 21 =
  34. 34.33 + 56 =
  35. 35.83 + 71 =
  36. 36.81 + 43 =
  37. 37.23 + 85 =
  38. 38.36 + 51 =
  39. 39.70 + 19 =
  40. 40.63 + 71 =

Answer key

  1. 77
  2. 101
  3. 63
  4. 124
  5. 63
  6. 120
  7. 98
  8. 115
  9. 134
  10. 104
  11. 119
  12. 69
  13. 70
  14. 78
  15. 95
  16. 65
  17. 114
  18. 103
  19. 135
  20. 96
  21. 97
  22. 108
  23. 99
  24. 145
  25. 141
  26. 91
  27. 108
  28. 81
  29. 111
  30. 93
  31. 53
  32. 154
  33. 61
  34. 89
  35. 154
  36. 124
  37. 108
  38. 87
  39. 89
  40. 134

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