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Mental Addition Worksheet for Class 2 and 3

Mental maths lesson 6: Add 2-digit numbers left to right · Set 577 · 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. 1.80 + 84 =
  2. 2.86 + 63 =
  3. 3.59 + 33 =
  4. 4.66 + 52 =
  5. 5.36 + 12 =
  6. 6.56 + 33 =
  7. 7.41 + 27 =
  8. 8.77 + 87 =
  9. 9.44 + 81 =
  10. 10.37 + 73 =
  11. 11.28 + 24 =
  12. 12.30 + 88 =
  13. 13.42 + 14 =
  14. 14.61 + 24 =
  15. 15.83 + 26 =
  16. 16.77 + 64 =
  17. 17.40 + 45 =
  18. 18.21 + 75 =
  19. 19.75 + 65 =
  20. 20.25 + 44 =
  21. 21.63 + 46 =
  22. 22.72 + 56 =
  23. 23.36 + 75 =
  24. 24.30 + 35 =
  25. 25.52 + 17 =
  26. 26.32 + 77 =
  27. 27.47 + 12 =
  28. 28.28 + 76 =
  29. 29.32 + 55 =
  30. 30.56 + 76 =
  31. 31.80 + 88 =
  32. 32.28 + 47 =
  33. 33.40 + 24 =
  34. 34.39 + 81 =
  35. 35.43 + 46 =
  36. 36.88 + 48 =
  37. 37.32 + 39 =
  38. 38.72 + 14 =
  39. 39.30 + 14 =
  40. 40.60 + 31 =

Answer key

  1. 164
  2. 149
  3. 92
  4. 118
  5. 48
  6. 89
  7. 68
  8. 164
  9. 125
  10. 110
  11. 52
  12. 118
  13. 56
  14. 85
  15. 109
  16. 141
  17. 85
  18. 96
  19. 140
  20. 69
  21. 109
  22. 128
  23. 111
  24. 65
  25. 69
  26. 109
  27. 59
  28. 104
  29. 87
  30. 132
  31. 168
  32. 75
  33. 64
  34. 120
  35. 89
  36. 136
  37. 71
  38. 86
  39. 44
  40. 91

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