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Mental Addition Worksheet for Class 2 and 3

Mental maths lesson 6: Add 2-digit numbers left to right · Set 971 · 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. 1.73 + 65 =
  2. 2.22 + 78 =
  3. 3.67 + 64 =
  4. 4.40 + 19 =
  5. 5.48 + 73 =
  6. 6.36 + 41 =
  7. 7.39 + 25 =
  8. 8.33 + 76 =
  9. 9.74 + 41 =
  10. 10.61 + 79 =
  11. 11.25 + 33 =
  12. 12.57 + 27 =
  13. 13.61 + 13 =
  14. 14.39 + 21 =
  15. 15.52 + 25 =
  16. 16.75 + 12 =
  17. 17.87 + 73 =
  18. 18.80 + 85 =
  19. 19.46 + 14 =
  20. 20.28 + 75 =
  21. 21.33 + 13 =
  22. 22.79 + 75 =
  23. 23.24 + 35 =
  24. 24.43 + 46 =
  25. 25.41 + 58 =
  26. 26.60 + 58 =
  27. 27.74 + 27 =
  28. 28.26 + 18 =
  29. 29.22 + 14 =
  30. 30.29 + 21 =
  31. 31.61 + 29 =
  32. 32.60 + 82 =
  33. 33.59 + 47 =
  34. 34.28 + 57 =
  35. 35.34 + 64 =
  36. 36.34 + 12 =
  37. 37.31 + 19 =
  38. 38.36 + 12 =
  39. 39.29 + 59 =
  40. 40.60 + 56 =

Answer key

  1. 138
  2. 100
  3. 131
  4. 59
  5. 121
  6. 77
  7. 64
  8. 109
  9. 115
  10. 140
  11. 58
  12. 84
  13. 74
  14. 60
  15. 77
  16. 87
  17. 160
  18. 165
  19. 60
  20. 103
  21. 46
  22. 154
  23. 59
  24. 89
  25. 99
  26. 118
  27. 101
  28. 44
  29. 36
  30. 50
  31. 90
  32. 142
  33. 106
  34. 85
  35. 98
  36. 46
  37. 50
  38. 48
  39. 88
  40. 116

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