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Mental Addition Worksheet for Class 2 and 3

Mental maths lesson 6: Add 2-digit numbers left to right · Set 676 · 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. 1.82 + 78 =
  2. 2.85 + 55 =
  3. 3.49 + 24 =
  4. 4.84 + 21 =
  5. 5.43 + 42 =
  6. 6.55 + 87 =
  7. 7.38 + 63 =
  8. 8.56 + 51 =
  9. 9.48 + 64 =
  10. 10.35 + 27 =
  11. 11.44 + 38 =
  12. 12.69 + 18 =
  13. 13.36 + 44 =
  14. 14.28 + 71 =
  15. 15.36 + 32 =
  16. 16.28 + 43 =
  17. 17.89 + 41 =
  18. 18.23 + 41 =
  19. 19.82 + 24 =
  20. 20.63 + 64 =
  21. 21.68 + 41 =
  22. 22.67 + 28 =
  23. 23.79 + 37 =
  24. 24.61 + 34 =
  25. 25.71 + 34 =
  26. 26.33 + 26 =
  27. 27.39 + 89 =
  28. 28.72 + 64 =
  29. 29.77 + 27 =
  30. 30.21 + 83 =
  31. 31.60 + 87 =
  32. 32.26 + 18 =
  33. 33.48 + 56 =
  34. 34.75 + 75 =
  35. 35.35 + 18 =
  36. 36.50 + 51 =
  37. 37.67 + 56 =
  38. 38.69 + 78 =
  39. 39.65 + 32 =
  40. 40.29 + 23 =

Answer key

  1. 160
  2. 140
  3. 73
  4. 105
  5. 85
  6. 142
  7. 101
  8. 107
  9. 112
  10. 62
  11. 82
  12. 87
  13. 80
  14. 99
  15. 68
  16. 71
  17. 130
  18. 64
  19. 106
  20. 127
  21. 109
  22. 95
  23. 116
  24. 95
  25. 105
  26. 59
  27. 128
  28. 136
  29. 104
  30. 104
  31. 147
  32. 44
  33. 104
  34. 150
  35. 53
  36. 101
  37. 123
  38. 147
  39. 97
  40. 52

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