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Mental Addition Worksheet for Class 2 and 3

Mental maths lesson 6: Add 2-digit numbers left to right · Set 663 · 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. 1.31 + 54 =
  2. 2.39 + 19 =
  3. 3.60 + 54 =
  4. 4.68 + 25 =
  5. 5.43 + 46 =
  6. 6.33 + 14 =
  7. 7.27 + 18 =
  8. 8.24 + 45 =
  9. 9.32 + 26 =
  10. 10.77 + 69 =
  11. 11.38 + 71 =
  12. 12.66 + 21 =
  13. 13.67 + 45 =
  14. 14.63 + 31 =
  15. 15.31 + 41 =
  16. 16.48 + 51 =
  17. 17.65 + 29 =
  18. 18.27 + 81 =
  19. 19.37 + 17 =
  20. 20.62 + 66 =
  21. 21.72 + 54 =
  22. 22.22 + 71 =
  23. 23.73 + 36 =
  24. 24.36 + 44 =
  25. 25.89 + 71 =
  26. 26.61 + 53 =
  27. 27.46 + 58 =
  28. 28.39 + 16 =
  29. 29.62 + 56 =
  30. 30.89 + 89 =
  31. 31.27 + 28 =
  32. 32.30 + 24 =
  33. 33.79 + 15 =
  34. 34.69 + 12 =
  35. 35.80 + 15 =
  36. 36.68 + 79 =
  37. 37.49 + 21 =
  38. 38.24 + 64 =
  39. 39.25 + 81 =
  40. 40.31 + 65 =

Answer key

  1. 85
  2. 58
  3. 114
  4. 93
  5. 89
  6. 47
  7. 45
  8. 69
  9. 58
  10. 146
  11. 109
  12. 87
  13. 112
  14. 94
  15. 72
  16. 99
  17. 94
  18. 108
  19. 54
  20. 128
  21. 126
  22. 93
  23. 109
  24. 80
  25. 160
  26. 114
  27. 104
  28. 55
  29. 118
  30. 178
  31. 55
  32. 54
  33. 94
  34. 81
  35. 95
  36. 147
  37. 70
  38. 88
  39. 106
  40. 96

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