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Mental Addition Worksheet for Class 2 and 3

Mental maths lesson 6: Add 2-digit numbers left to right · Set 348 · 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. 1.35 + 34 =
  2. 2.86 + 88 =
  3. 3.60 + 38 =
  4. 4.84 + 59 =
  5. 5.62 + 15 =
  6. 6.57 + 75 =
  7. 7.34 + 66 =
  8. 8.83 + 33 =
  9. 9.55 + 13 =
  10. 10.74 + 21 =
  11. 11.72 + 24 =
  12. 12.46 + 44 =
  13. 13.27 + 28 =
  14. 14.33 + 58 =
  15. 15.64 + 51 =
  16. 16.65 + 67 =
  17. 17.89 + 21 =
  18. 18.22 + 15 =
  19. 19.39 + 21 =
  20. 20.40 + 25 =
  21. 21.42 + 12 =
  22. 22.45 + 13 =
  23. 23.68 + 21 =
  24. 24.33 + 15 =
  25. 25.36 + 83 =
  26. 26.82 + 28 =
  27. 27.68 + 18 =
  28. 28.54 + 69 =
  29. 29.45 + 29 =
  30. 30.32 + 51 =
  31. 31.31 + 16 =
  32. 32.37 + 42 =
  33. 33.48 + 83 =
  34. 34.26 + 47 =
  35. 35.43 + 31 =
  36. 36.81 + 59 =
  37. 37.33 + 53 =
  38. 38.34 + 53 =
  39. 39.80 + 48 =
  40. 40.80 + 35 =

Answer key

  1. 69
  2. 174
  3. 98
  4. 143
  5. 77
  6. 132
  7. 100
  8. 116
  9. 68
  10. 95
  11. 96
  12. 90
  13. 55
  14. 91
  15. 115
  16. 132
  17. 110
  18. 37
  19. 60
  20. 65
  21. 54
  22. 58
  23. 89
  24. 48
  25. 119
  26. 110
  27. 86
  28. 123
  29. 74
  30. 83
  31. 47
  32. 79
  33. 131
  34. 73
  35. 74
  36. 140
  37. 86
  38. 87
  39. 128
  40. 115

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