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Mental Addition Worksheet for Class 2 and 3

Mental maths lesson 6: Add 2-digit numbers left to right · Set 922 · 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. 1.60 + 71 =
  2. 2.63 + 39 =
  3. 3.60 + 18 =
  4. 4.68 + 39 =
  5. 5.83 + 22 =
  6. 6.85 + 38 =
  7. 7.79 + 36 =
  8. 8.64 + 25 =
  9. 9.36 + 66 =
  10. 10.74 + 53 =
  11. 11.73 + 18 =
  12. 12.43 + 19 =
  13. 13.48 + 51 =
  14. 14.37 + 12 =
  15. 15.84 + 51 =
  16. 16.89 + 56 =
  17. 17.59 + 53 =
  18. 18.42 + 71 =
  19. 19.55 + 83 =
  20. 20.55 + 18 =
  21. 21.55 + 76 =
  22. 22.46 + 61 =
  23. 23.54 + 49 =
  24. 24.38 + 58 =
  25. 25.81 + 37 =
  26. 26.53 + 71 =
  27. 27.52 + 71 =
  28. 28.26 + 27 =
  29. 29.40 + 49 =
  30. 30.52 + 68 =
  31. 31.37 + 41 =
  32. 32.40 + 71 =
  33. 33.23 + 47 =
  34. 34.74 + 68 =
  35. 35.45 + 12 =
  36. 36.88 + 29 =
  37. 37.22 + 87 =
  38. 38.44 + 88 =
  39. 39.27 + 28 =
  40. 40.80 + 39 =

Answer key

  1. 131
  2. 102
  3. 78
  4. 107
  5. 105
  6. 123
  7. 115
  8. 89
  9. 102
  10. 127
  11. 91
  12. 62
  13. 99
  14. 49
  15. 135
  16. 145
  17. 112
  18. 113
  19. 138
  20. 73
  21. 131
  22. 107
  23. 103
  24. 96
  25. 118
  26. 124
  27. 123
  28. 53
  29. 89
  30. 120
  31. 78
  32. 111
  33. 70
  34. 142
  35. 57
  36. 117
  37. 109
  38. 132
  39. 55
  40. 119

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