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Mental Addition Worksheet for Class 2 and 3

Mental maths lesson 6: Add 2-digit numbers left to right · Set 628 · 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 + 24 =
  2. 2.73 + 72 =
  3. 3.84 + 45 =
  4. 4.48 + 29 =
  5. 5.41 + 13 =
  6. 6.51 + 81 =
  7. 7.26 + 37 =
  8. 8.62 + 24 =
  9. 9.48 + 58 =
  10. 10.44 + 19 =
  11. 11.40 + 46 =
  12. 12.41 + 31 =
  13. 13.33 + 29 =
  14. 14.27 + 15 =
  15. 15.63 + 69 =
  16. 16.89 + 39 =
  17. 17.40 + 18 =
  18. 18.60 + 46 =
  19. 19.77 + 53 =
  20. 20.67 + 47 =
  21. 21.47 + 34 =
  22. 22.55 + 68 =
  23. 23.61 + 66 =
  24. 24.79 + 83 =
  25. 25.67 + 25 =
  26. 26.47 + 74 =
  27. 27.25 + 63 =
  28. 28.68 + 39 =
  29. 29.69 + 26 =
  30. 30.78 + 62 =
  31. 31.39 + 13 =
  32. 32.55 + 59 =
  33. 33.59 + 23 =
  34. 34.70 + 68 =
  35. 35.41 + 67 =
  36. 36.44 + 28 =
  37. 37.79 + 85 =
  38. 38.34 + 13 =
  39. 39.42 + 14 =
  40. 40.46 + 87 =

Answer key

  1. 62
  2. 145
  3. 129
  4. 77
  5. 54
  6. 132
  7. 63
  8. 86
  9. 106
  10. 63
  11. 86
  12. 72
  13. 62
  14. 42
  15. 132
  16. 128
  17. 58
  18. 106
  19. 130
  20. 114
  21. 81
  22. 123
  23. 127
  24. 162
  25. 92
  26. 121
  27. 88
  28. 107
  29. 95
  30. 140
  31. 52
  32. 114
  33. 82
  34. 138
  35. 108
  36. 72
  37. 164
  38. 47
  39. 56
  40. 133

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