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Mental Addition Worksheet for Class 2 and 3

Mental maths lesson 6: Add 2-digit numbers left to right · Set 882 · 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. 1.67 + 29 =
  2. 2.39 + 42 =
  3. 3.85 + 29 =
  4. 4.57 + 46 =
  5. 5.43 + 71 =
  6. 6.24 + 47 =
  7. 7.81 + 63 =
  8. 8.43 + 36 =
  9. 9.41 + 15 =
  10. 10.46 + 17 =
  11. 11.21 + 18 =
  12. 12.44 + 14 =
  13. 13.89 + 19 =
  14. 14.21 + 74 =
  15. 15.75 + 14 =
  16. 16.33 + 33 =
  17. 17.41 + 31 =
  18. 18.32 + 58 =
  19. 19.44 + 74 =
  20. 20.64 + 69 =
  21. 21.33 + 31 =
  22. 22.85 + 63 =
  23. 23.24 + 37 =
  24. 24.21 + 21 =
  25. 25.69 + 63 =
  26. 26.27 + 19 =
  27. 27.38 + 29 =
  28. 28.86 + 25 =
  29. 29.25 + 43 =
  30. 30.43 + 38 =
  31. 31.42 + 53 =
  32. 32.32 + 34 =
  33. 33.30 + 85 =
  34. 34.25 + 88 =
  35. 35.54 + 76 =
  36. 36.34 + 65 =
  37. 37.69 + 21 =
  38. 38.37 + 41 =
  39. 39.63 + 21 =
  40. 40.81 + 31 =

Answer key

  1. 96
  2. 81
  3. 114
  4. 103
  5. 114
  6. 71
  7. 144
  8. 79
  9. 56
  10. 63
  11. 39
  12. 58
  13. 108
  14. 95
  15. 89
  16. 66
  17. 72
  18. 90
  19. 118
  20. 133
  21. 64
  22. 148
  23. 61
  24. 42
  25. 132
  26. 46
  27. 67
  28. 111
  29. 68
  30. 81
  31. 95
  32. 66
  33. 115
  34. 113
  35. 130
  36. 99
  37. 90
  38. 78
  39. 84
  40. 112

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