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Mental Addition Worksheet for Class 2 and 3

Mental maths lesson 6: Add 2-digit numbers left to right · Set 127 · 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. 1.46 + 15 =
  2. 2.57 + 18 =
  3. 3.80 + 81 =
  4. 4.81 + 45 =
  5. 5.43 + 57 =
  6. 6.31 + 23 =
  7. 7.76 + 26 =
  8. 8.39 + 69 =
  9. 9.44 + 68 =
  10. 10.31 + 27 =
  11. 11.50 + 63 =
  12. 12.43 + 43 =
  13. 13.21 + 41 =
  14. 14.63 + 44 =
  15. 15.33 + 19 =
  16. 16.60 + 25 =
  17. 17.82 + 19 =
  18. 18.37 + 67 =
  19. 19.34 + 17 =
  20. 20.38 + 26 =
  21. 21.71 + 12 =
  22. 22.65 + 12 =
  23. 23.79 + 27 =
  24. 24.34 + 23 =
  25. 25.78 + 46 =
  26. 26.50 + 15 =
  27. 27.67 + 14 =
  28. 28.31 + 15 =
  29. 29.68 + 42 =
  30. 30.30 + 25 =
  31. 31.41 + 57 =
  32. 32.60 + 59 =
  33. 33.68 + 55 =
  34. 34.65 + 82 =
  35. 35.36 + 19 =
  36. 36.69 + 19 =
  37. 37.37 + 72 =
  38. 38.45 + 87 =
  39. 39.31 + 43 =
  40. 40.30 + 83 =

Answer key

  1. 61
  2. 75
  3. 161
  4. 126
  5. 100
  6. 54
  7. 102
  8. 108
  9. 112
  10. 58
  11. 113
  12. 86
  13. 62
  14. 107
  15. 52
  16. 85
  17. 101
  18. 104
  19. 51
  20. 64
  21. 83
  22. 77
  23. 106
  24. 57
  25. 124
  26. 65
  27. 81
  28. 46
  29. 110
  30. 55
  31. 98
  32. 119
  33. 123
  34. 147
  35. 55
  36. 88
  37. 109
  38. 132
  39. 74
  40. 113

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