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Mental Addition Worksheet for Class 2 and 3

Mental maths lesson 6: Add 2-digit numbers left to right · Set 541 · 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. 1.42 + 43 =
  2. 2.35 + 21 =
  3. 3.67 + 79 =
  4. 4.45 + 33 =
  5. 5.85 + 37 =
  6. 6.69 + 53 =
  7. 7.61 + 67 =
  8. 8.29 + 66 =
  9. 9.22 + 33 =
  10. 10.33 + 18 =
  11. 11.39 + 26 =
  12. 12.53 + 15 =
  13. 13.36 + 58 =
  14. 14.22 + 29 =
  15. 15.34 + 71 =
  16. 16.53 + 65 =
  17. 17.31 + 26 =
  18. 18.26 + 55 =
  19. 19.46 + 42 =
  20. 20.33 + 54 =
  21. 21.55 + 84 =
  22. 22.35 + 27 =
  23. 23.69 + 24 =
  24. 24.49 + 51 =
  25. 25.34 + 81 =
  26. 26.78 + 21 =
  27. 27.79 + 86 =
  28. 28.88 + 26 =
  29. 29.52 + 27 =
  30. 30.41 + 69 =
  31. 31.22 + 65 =
  32. 32.63 + 67 =
  33. 33.47 + 69 =
  34. 34.85 + 14 =
  35. 35.43 + 39 =
  36. 36.37 + 19 =
  37. 37.37 + 83 =
  38. 38.24 + 19 =
  39. 39.56 + 88 =
  40. 40.60 + 78 =

Answer key

  1. 85
  2. 56
  3. 146
  4. 78
  5. 122
  6. 122
  7. 128
  8. 95
  9. 55
  10. 51
  11. 65
  12. 68
  13. 94
  14. 51
  15. 105
  16. 118
  17. 57
  18. 81
  19. 88
  20. 87
  21. 139
  22. 62
  23. 93
  24. 100
  25. 115
  26. 99
  27. 165
  28. 114
  29. 79
  30. 110
  31. 87
  32. 130
  33. 116
  34. 99
  35. 82
  36. 56
  37. 120
  38. 43
  39. 144
  40. 138

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