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Mental Addition Worksheet for Class 2 and 3

Mental maths lesson 6: Add 2-digit numbers left to right · Set 737 · 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. 1.49 + 21 =
  2. 2.47 + 75 =
  3. 3.61 + 76 =
  4. 4.84 + 35 =
  5. 5.73 + 49 =
  6. 6.26 + 88 =
  7. 7.39 + 29 =
  8. 8.78 + 37 =
  9. 9.24 + 81 =
  10. 10.26 + 46 =
  11. 11.35 + 41 =
  12. 12.82 + 48 =
  13. 13.23 + 47 =
  14. 14.53 + 54 =
  15. 15.27 + 89 =
  16. 16.66 + 21 =
  17. 17.58 + 48 =
  18. 18.58 + 37 =
  19. 19.32 + 89 =
  20. 20.21 + 65 =
  21. 21.65 + 15 =
  22. 22.65 + 67 =
  23. 23.26 + 14 =
  24. 24.35 + 73 =
  25. 25.55 + 22 =
  26. 26.44 + 19 =
  27. 27.50 + 51 =
  28. 28.49 + 32 =
  29. 29.75 + 69 =
  30. 30.51 + 64 =
  31. 31.32 + 43 =
  32. 32.84 + 49 =
  33. 33.52 + 85 =
  34. 34.30 + 34 =
  35. 35.67 + 82 =
  36. 36.74 + 65 =
  37. 37.31 + 63 =
  38. 38.28 + 13 =
  39. 39.58 + 81 =
  40. 40.66 + 15 =

Answer key

  1. 70
  2. 122
  3. 137
  4. 119
  5. 122
  6. 114
  7. 68
  8. 115
  9. 105
  10. 72
  11. 76
  12. 130
  13. 70
  14. 107
  15. 116
  16. 87
  17. 106
  18. 95
  19. 121
  20. 86
  21. 80
  22. 132
  23. 40
  24. 108
  25. 77
  26. 63
  27. 101
  28. 81
  29. 144
  30. 115
  31. 75
  32. 133
  33. 137
  34. 64
  35. 149
  36. 139
  37. 94
  38. 41
  39. 139
  40. 81

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