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Mental Addition Worksheet for Class 2 and 3

Mental maths lesson 6: Add 2-digit numbers left to right · Set 207 · 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. 1.73 + 37 =
  2. 2.73 + 17 =
  3. 3.58 + 32 =
  4. 4.63 + 84 =
  5. 5.75 + 46 =
  6. 6.51 + 33 =
  7. 7.24 + 13 =
  8. 8.67 + 31 =
  9. 9.70 + 18 =
  10. 10.44 + 36 =
  11. 11.45 + 58 =
  12. 12.67 + 27 =
  13. 13.78 + 77 =
  14. 14.39 + 31 =
  15. 15.76 + 64 =
  16. 16.25 + 71 =
  17. 17.78 + 41 =
  18. 18.59 + 89 =
  19. 19.51 + 41 =
  20. 20.37 + 46 =
  21. 21.44 + 85 =
  22. 22.51 + 13 =
  23. 23.34 + 46 =
  24. 24.26 + 23 =
  25. 25.43 + 14 =
  26. 26.38 + 71 =
  27. 27.44 + 51 =
  28. 28.21 + 57 =
  29. 29.22 + 18 =
  30. 30.57 + 86 =
  31. 31.88 + 76 =
  32. 32.34 + 16 =
  33. 33.39 + 87 =
  34. 34.45 + 45 =
  35. 35.29 + 21 =
  36. 36.30 + 26 =
  37. 37.59 + 81 =
  38. 38.26 + 81 =
  39. 39.21 + 62 =
  40. 40.74 + 57 =

Answer key

  1. 110
  2. 90
  3. 90
  4. 147
  5. 121
  6. 84
  7. 37
  8. 98
  9. 88
  10. 80
  11. 103
  12. 94
  13. 155
  14. 70
  15. 140
  16. 96
  17. 119
  18. 148
  19. 92
  20. 83
  21. 129
  22. 64
  23. 80
  24. 49
  25. 57
  26. 109
  27. 95
  28. 78
  29. 40
  30. 143
  31. 164
  32. 50
  33. 126
  34. 90
  35. 50
  36. 56
  37. 140
  38. 107
  39. 83
  40. 131

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