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Mental Addition Worksheet for Class 2 and 3

Mental maths lesson 6: Add 2-digit numbers left to right · Set 758 · 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. 1.78 + 45 =
  2. 2.26 + 82 =
  3. 3.79 + 88 =
  4. 4.34 + 19 =
  5. 5.42 + 18 =
  6. 6.22 + 15 =
  7. 7.33 + 28 =
  8. 8.60 + 27 =
  9. 9.62 + 37 =
  10. 10.46 + 44 =
  11. 11.71 + 19 =
  12. 12.48 + 28 =
  13. 13.43 + 24 =
  14. 14.27 + 53 =
  15. 15.36 + 59 =
  16. 16.65 + 59 =
  17. 17.47 + 61 =
  18. 18.88 + 51 =
  19. 19.63 + 81 =
  20. 20.33 + 31 =
  21. 21.67 + 89 =
  22. 22.76 + 61 =
  23. 23.82 + 23 =
  24. 24.49 + 13 =
  25. 25.29 + 82 =
  26. 26.42 + 88 =
  27. 27.30 + 58 =
  28. 28.61 + 31 =
  29. 29.48 + 57 =
  30. 30.38 + 87 =
  31. 31.27 + 32 =
  32. 32.29 + 89 =
  33. 33.47 + 55 =
  34. 34.40 + 12 =
  35. 35.58 + 44 =
  36. 36.80 + 27 =
  37. 37.22 + 87 =
  38. 38.23 + 33 =
  39. 39.31 + 38 =
  40. 40.74 + 82 =

Answer key

  1. 123
  2. 108
  3. 167
  4. 53
  5. 60
  6. 37
  7. 61
  8. 87
  9. 99
  10. 90
  11. 90
  12. 76
  13. 67
  14. 80
  15. 95
  16. 124
  17. 108
  18. 139
  19. 144
  20. 64
  21. 156
  22. 137
  23. 105
  24. 62
  25. 111
  26. 130
  27. 88
  28. 92
  29. 105
  30. 125
  31. 59
  32. 118
  33. 102
  34. 52
  35. 102
  36. 107
  37. 109
  38. 56
  39. 69
  40. 156

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