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Mental Addition Worksheet for Class 2 and 3

Mental maths lesson 6: Add 2-digit numbers left to right · Set 597 · 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. 1.45 + 76 =
  2. 2.64 + 19 =
  3. 3.35 + 34 =
  4. 4.52 + 34 =
  5. 5.47 + 81 =
  6. 6.34 + 31 =
  7. 7.76 + 63 =
  8. 8.23 + 21 =
  9. 9.45 + 22 =
  10. 10.35 + 51 =
  11. 11.30 + 47 =
  12. 12.82 + 78 =
  13. 13.88 + 32 =
  14. 14.72 + 79 =
  15. 15.45 + 81 =
  16. 16.29 + 55 =
  17. 17.33 + 45 =
  18. 18.35 + 42 =
  19. 19.61 + 47 =
  20. 20.59 + 62 =
  21. 21.70 + 21 =
  22. 22.71 + 14 =
  23. 23.33 + 25 =
  24. 24.26 + 24 =
  25. 25.72 + 31 =
  26. 26.32 + 17 =
  27. 27.57 + 34 =
  28. 28.23 + 83 =
  29. 29.25 + 22 =
  30. 30.67 + 71 =
  31. 31.33 + 55 =
  32. 32.53 + 87 =
  33. 33.30 + 46 =
  34. 34.65 + 43 =
  35. 35.31 + 88 =
  36. 36.49 + 17 =
  37. 37.43 + 21 =
  38. 38.76 + 21 =
  39. 39.80 + 39 =
  40. 40.29 + 42 =

Answer key

  1. 121
  2. 83
  3. 69
  4. 86
  5. 128
  6. 65
  7. 139
  8. 44
  9. 67
  10. 86
  11. 77
  12. 160
  13. 120
  14. 151
  15. 126
  16. 84
  17. 78
  18. 77
  19. 108
  20. 121
  21. 91
  22. 85
  23. 58
  24. 50
  25. 103
  26. 49
  27. 91
  28. 106
  29. 47
  30. 138
  31. 88
  32. 140
  33. 76
  34. 108
  35. 119
  36. 66
  37. 64
  38. 97
  39. 119
  40. 71

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