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Mental Addition Worksheet for Class 2 and 3

Mental maths lesson 6: Add 2-digit numbers left to right · Set 206 · 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. 1.63 + 36 =
  2. 2.68 + 25 =
  3. 3.55 + 45 =
  4. 4.42 + 87 =
  5. 5.56 + 89 =
  6. 6.32 + 67 =
  7. 7.88 + 86 =
  8. 8.38 + 62 =
  9. 9.39 + 77 =
  10. 10.70 + 31 =
  11. 11.88 + 43 =
  12. 12.32 + 32 =
  13. 13.32 + 44 =
  14. 14.43 + 33 =
  15. 15.59 + 35 =
  16. 16.73 + 79 =
  17. 17.62 + 61 =
  18. 18.85 + 89 =
  19. 19.28 + 62 =
  20. 20.89 + 71 =
  21. 21.40 + 84 =
  22. 22.28 + 47 =
  23. 23.87 + 34 =
  24. 24.23 + 27 =
  25. 25.51 + 61 =
  26. 26.26 + 74 =
  27. 27.25 + 19 =
  28. 28.40 + 56 =
  29. 29.84 + 72 =
  30. 30.24 + 21 =
  31. 31.89 + 81 =
  32. 32.25 + 61 =
  33. 33.40 + 24 =
  34. 34.41 + 55 =
  35. 35.45 + 71 =
  36. 36.68 + 41 =
  37. 37.37 + 66 =
  38. 38.69 + 71 =
  39. 39.57 + 19 =
  40. 40.29 + 54 =

Answer key

  1. 99
  2. 93
  3. 100
  4. 129
  5. 145
  6. 99
  7. 174
  8. 100
  9. 116
  10. 101
  11. 131
  12. 64
  13. 76
  14. 76
  15. 94
  16. 152
  17. 123
  18. 174
  19. 90
  20. 160
  21. 124
  22. 75
  23. 121
  24. 50
  25. 112
  26. 100
  27. 44
  28. 96
  29. 156
  30. 45
  31. 170
  32. 86
  33. 64
  34. 96
  35. 116
  36. 109
  37. 103
  38. 140
  39. 76
  40. 83

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