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Mental Addition Worksheet for Class 2 and 3

Mental maths lesson 6: Add 2-digit numbers left to right · Set 898 · 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. 1.50 + 49 =
  2. 2.37 + 54 =
  3. 3.28 + 18 =
  4. 4.37 + 51 =
  5. 5.23 + 73 =
  6. 6.36 + 88 =
  7. 7.61 + 81 =
  8. 8.45 + 72 =
  9. 9.86 + 27 =
  10. 10.23 + 71 =
  11. 11.66 + 14 =
  12. 12.60 + 63 =
  13. 13.58 + 76 =
  14. 14.59 + 29 =
  15. 15.27 + 19 =
  16. 16.54 + 51 =
  17. 17.57 + 86 =
  18. 18.47 + 78 =
  19. 19.66 + 75 =
  20. 20.85 + 25 =
  21. 21.53 + 23 =
  22. 22.21 + 15 =
  23. 23.33 + 36 =
  24. 24.55 + 27 =
  25. 25.38 + 73 =
  26. 26.69 + 89 =
  27. 27.35 + 21 =
  28. 28.52 + 88 =
  29. 29.74 + 69 =
  30. 30.78 + 21 =
  31. 31.57 + 73 =
  32. 32.35 + 68 =
  33. 33.23 + 51 =
  34. 34.51 + 21 =
  35. 35.28 + 81 =
  36. 36.82 + 69 =
  37. 37.31 + 64 =
  38. 38.35 + 18 =
  39. 39.62 + 47 =
  40. 40.30 + 32 =

Answer key

  1. 99
  2. 91
  3. 46
  4. 88
  5. 96
  6. 124
  7. 142
  8. 117
  9. 113
  10. 94
  11. 80
  12. 123
  13. 134
  14. 88
  15. 46
  16. 105
  17. 143
  18. 125
  19. 141
  20. 110
  21. 76
  22. 36
  23. 69
  24. 82
  25. 111
  26. 158
  27. 56
  28. 140
  29. 143
  30. 99
  31. 130
  32. 103
  33. 74
  34. 72
  35. 109
  36. 151
  37. 95
  38. 53
  39. 109
  40. 62

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