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Mental Addition Worksheet for Class 2 and 3

Mental maths lesson 6: Add 2-digit numbers left to right · Set 918 · 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. 1.62 + 43 =
  2. 2.72 + 44 =
  3. 3.78 + 14 =
  4. 4.50 + 87 =
  5. 5.55 + 21 =
  6. 6.24 + 89 =
  7. 7.79 + 21 =
  8. 8.38 + 78 =
  9. 9.77 + 33 =
  10. 10.82 + 71 =
  11. 11.53 + 53 =
  12. 12.37 + 46 =
  13. 13.65 + 28 =
  14. 14.77 + 54 =
  15. 15.22 + 89 =
  16. 16.73 + 75 =
  17. 17.32 + 58 =
  18. 18.65 + 26 =
  19. 19.49 + 61 =
  20. 20.61 + 42 =
  21. 21.71 + 37 =
  22. 22.64 + 27 =
  23. 23.84 + 32 =
  24. 24.32 + 38 =
  25. 25.48 + 71 =
  26. 26.80 + 48 =
  27. 27.68 + 54 =
  28. 28.66 + 27 =
  29. 29.62 + 36 =
  30. 30.48 + 66 =
  31. 31.67 + 55 =
  32. 32.22 + 21 =
  33. 33.42 + 62 =
  34. 34.47 + 71 =
  35. 35.35 + 87 =
  36. 36.26 + 63 =
  37. 37.47 + 29 =
  38. 38.24 + 66 =
  39. 39.69 + 16 =
  40. 40.55 + 45 =

Answer key

  1. 105
  2. 116
  3. 92
  4. 137
  5. 76
  6. 113
  7. 100
  8. 116
  9. 110
  10. 153
  11. 106
  12. 83
  13. 93
  14. 131
  15. 111
  16. 148
  17. 90
  18. 91
  19. 110
  20. 103
  21. 108
  22. 91
  23. 116
  24. 70
  25. 119
  26. 128
  27. 122
  28. 93
  29. 98
  30. 114
  31. 122
  32. 43
  33. 104
  34. 118
  35. 122
  36. 89
  37. 76
  38. 90
  39. 85
  40. 100

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