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Mental Addition Worksheet for Class 2 and 3

Mental maths lesson 6: Add 2-digit numbers left to right · Set 919 · 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. 1.42 + 65 =
  2. 2.54 + 74 =
  3. 3.45 + 61 =
  4. 4.48 + 16 =
  5. 5.33 + 22 =
  6. 6.58 + 27 =
  7. 7.65 + 21 =
  8. 8.27 + 17 =
  9. 9.54 + 21 =
  10. 10.53 + 63 =
  11. 11.54 + 85 =
  12. 12.37 + 56 =
  13. 13.84 + 43 =
  14. 14.79 + 28 =
  15. 15.80 + 58 =
  16. 16.63 + 84 =
  17. 17.75 + 32 =
  18. 18.24 + 31 =
  19. 19.72 + 51 =
  20. 20.76 + 37 =
  21. 21.25 + 21 =
  22. 22.82 + 66 =
  23. 23.78 + 52 =
  24. 24.21 + 19 =
  25. 25.60 + 24 =
  26. 26.30 + 12 =
  27. 27.39 + 31 =
  28. 28.41 + 21 =
  29. 29.37 + 19 =
  30. 30.39 + 46 =
  31. 31.28 + 71 =
  32. 32.64 + 26 =
  33. 33.23 + 83 =
  34. 34.89 + 51 =
  35. 35.80 + 29 =
  36. 36.82 + 69 =
  37. 37.87 + 87 =
  38. 38.64 + 67 =
  39. 39.35 + 71 =
  40. 40.24 + 26 =

Answer key

  1. 107
  2. 128
  3. 106
  4. 64
  5. 55
  6. 85
  7. 86
  8. 44
  9. 75
  10. 116
  11. 139
  12. 93
  13. 127
  14. 107
  15. 138
  16. 147
  17. 107
  18. 55
  19. 123
  20. 113
  21. 46
  22. 148
  23. 130
  24. 40
  25. 84
  26. 42
  27. 70
  28. 62
  29. 56
  30. 85
  31. 99
  32. 90
  33. 106
  34. 140
  35. 109
  36. 151
  37. 174
  38. 131
  39. 106
  40. 50

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