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Mental Addition Worksheet for Class 2 and 3

Mental maths lesson 6: Add 2-digit numbers left to right · Set 549 · 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. 1.38 + 88 =
  2. 2.84 + 21 =
  3. 3.87 + 54 =
  4. 4.87 + 23 =
  5. 5.24 + 51 =
  6. 6.38 + 15 =
  7. 7.24 + 33 =
  8. 8.39 + 78 =
  9. 9.26 + 63 =
  10. 10.36 + 55 =
  11. 11.56 + 32 =
  12. 12.24 + 84 =
  13. 13.27 + 16 =
  14. 14.59 + 31 =
  15. 15.38 + 27 =
  16. 16.40 + 88 =
  17. 17.26 + 73 =
  18. 18.62 + 71 =
  19. 19.58 + 35 =
  20. 20.44 + 65 =
  21. 21.48 + 57 =
  22. 22.58 + 49 =
  23. 23.28 + 61 =
  24. 24.24 + 76 =
  25. 25.26 + 66 =
  26. 26.29 + 81 =
  27. 27.36 + 62 =
  28. 28.81 + 67 =
  29. 29.28 + 53 =
  30. 30.34 + 16 =
  31. 31.37 + 31 =
  32. 32.25 + 57 =
  33. 33.46 + 51 =
  34. 34.85 + 41 =
  35. 35.40 + 65 =
  36. 36.32 + 67 =
  37. 37.40 + 56 =
  38. 38.53 + 74 =
  39. 39.86 + 59 =
  40. 40.70 + 51 =

Answer key

  1. 126
  2. 105
  3. 141
  4. 110
  5. 75
  6. 53
  7. 57
  8. 117
  9. 89
  10. 91
  11. 88
  12. 108
  13. 43
  14. 90
  15. 65
  16. 128
  17. 99
  18. 133
  19. 93
  20. 109
  21. 105
  22. 107
  23. 89
  24. 100
  25. 92
  26. 110
  27. 98
  28. 148
  29. 81
  30. 50
  31. 68
  32. 82
  33. 97
  34. 126
  35. 105
  36. 99
  37. 96
  38. 127
  39. 145
  40. 121

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