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Mental Addition Worksheet for Class 2 and 3

Mental maths lesson 6: Add 2-digit numbers left to right · Set 236 · 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. 1.39 + 65 =
  2. 2.74 + 18 =
  3. 3.68 + 71 =
  4. 4.70 + 28 =
  5. 5.65 + 24 =
  6. 6.85 + 16 =
  7. 7.50 + 14 =
  8. 8.35 + 31 =
  9. 9.63 + 77 =
  10. 10.57 + 24 =
  11. 11.29 + 74 =
  12. 12.74 + 73 =
  13. 13.63 + 22 =
  14. 14.66 + 41 =
  15. 15.25 + 77 =
  16. 16.54 + 38 =
  17. 17.38 + 19 =
  18. 18.37 + 18 =
  19. 19.69 + 41 =
  20. 20.42 + 14 =
  21. 21.63 + 27 =
  22. 22.51 + 79 =
  23. 23.88 + 65 =
  24. 24.50 + 17 =
  25. 25.59 + 61 =
  26. 26.38 + 17 =
  27. 27.24 + 58 =
  28. 28.71 + 63 =
  29. 29.79 + 88 =
  30. 30.33 + 44 =
  31. 31.82 + 28 =
  32. 32.24 + 21 =
  33. 33.79 + 63 =
  34. 34.50 + 57 =
  35. 35.24 + 66 =
  36. 36.78 + 48 =
  37. 37.76 + 22 =
  38. 38.31 + 13 =
  39. 39.56 + 81 =
  40. 40.21 + 81 =

Answer key

  1. 104
  2. 92
  3. 139
  4. 98
  5. 89
  6. 101
  7. 64
  8. 66
  9. 140
  10. 81
  11. 103
  12. 147
  13. 85
  14. 107
  15. 102
  16. 92
  17. 57
  18. 55
  19. 110
  20. 56
  21. 90
  22. 130
  23. 153
  24. 67
  25. 120
  26. 55
  27. 82
  28. 134
  29. 167
  30. 77
  31. 110
  32. 45
  33. 142
  34. 107
  35. 90
  36. 126
  37. 98
  38. 44
  39. 137
  40. 102

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