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Mental Addition Worksheet for Class 2 and 3

Mental maths lesson 6: Add 2-digit numbers left to right · Set 863 · 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. 1.36 + 18 =
  2. 2.71 + 76 =
  3. 3.58 + 41 =
  4. 4.89 + 29 =
  5. 5.30 + 61 =
  6. 6.47 + 88 =
  7. 7.28 + 57 =
  8. 8.81 + 57 =
  9. 9.47 + 54 =
  10. 10.69 + 52 =
  11. 11.39 + 84 =
  12. 12.30 + 88 =
  13. 13.28 + 22 =
  14. 14.89 + 41 =
  15. 15.75 + 26 =
  16. 16.29 + 72 =
  17. 17.39 + 33 =
  18. 18.68 + 34 =
  19. 19.68 + 37 =
  20. 20.59 + 31 =
  21. 21.52 + 26 =
  22. 22.29 + 63 =
  23. 23.49 + 64 =
  24. 24.61 + 36 =
  25. 25.80 + 15 =
  26. 26.74 + 78 =
  27. 27.89 + 53 =
  28. 28.59 + 51 =
  29. 29.40 + 85 =
  30. 30.66 + 16 =
  31. 31.86 + 62 =
  32. 32.80 + 42 =
  33. 33.64 + 81 =
  34. 34.32 + 31 =
  35. 35.73 + 12 =
  36. 36.52 + 61 =
  37. 37.56 + 28 =
  38. 38.56 + 56 =
  39. 39.32 + 65 =
  40. 40.23 + 49 =

Answer key

  1. 54
  2. 147
  3. 99
  4. 118
  5. 91
  6. 135
  7. 85
  8. 138
  9. 101
  10. 121
  11. 123
  12. 118
  13. 50
  14. 130
  15. 101
  16. 101
  17. 72
  18. 102
  19. 105
  20. 90
  21. 78
  22. 92
  23. 113
  24. 97
  25. 95
  26. 152
  27. 142
  28. 110
  29. 125
  30. 82
  31. 148
  32. 122
  33. 145
  34. 63
  35. 85
  36. 113
  37. 84
  38. 112
  39. 97
  40. 72

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