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Mental Addition Worksheet for Class 2 and 3

Mental maths lesson 6: Add 2-digit numbers left to right · Set 901 · 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. 1.46 + 25 =
  2. 2.66 + 14 =
  3. 3.51 + 38 =
  4. 4.64 + 39 =
  5. 5.27 + 59 =
  6. 6.47 + 27 =
  7. 7.48 + 56 =
  8. 8.43 + 13 =
  9. 9.73 + 65 =
  10. 10.67 + 28 =
  11. 11.60 + 22 =
  12. 12.35 + 72 =
  13. 13.24 + 27 =
  14. 14.83 + 18 =
  15. 15.43 + 55 =
  16. 16.52 + 69 =
  17. 17.74 + 34 =
  18. 18.69 + 15 =
  19. 19.75 + 71 =
  20. 20.54 + 88 =
  21. 21.68 + 38 =
  22. 22.49 + 63 =
  23. 23.21 + 39 =
  24. 24.64 + 76 =
  25. 25.35 + 66 =
  26. 26.38 + 33 =
  27. 27.88 + 16 =
  28. 28.84 + 52 =
  29. 29.79 + 66 =
  30. 30.31 + 17 =
  31. 31.28 + 53 =
  32. 32.51 + 29 =
  33. 33.86 + 19 =
  34. 34.54 + 77 =
  35. 35.80 + 59 =
  36. 36.41 + 34 =
  37. 37.70 + 69 =
  38. 38.68 + 27 =
  39. 39.36 + 17 =
  40. 40.52 + 81 =

Answer key

  1. 71
  2. 80
  3. 89
  4. 103
  5. 86
  6. 74
  7. 104
  8. 56
  9. 138
  10. 95
  11. 82
  12. 107
  13. 51
  14. 101
  15. 98
  16. 121
  17. 108
  18. 84
  19. 146
  20. 142
  21. 106
  22. 112
  23. 60
  24. 140
  25. 101
  26. 71
  27. 104
  28. 136
  29. 145
  30. 48
  31. 81
  32. 80
  33. 105
  34. 131
  35. 139
  36. 75
  37. 139
  38. 95
  39. 53
  40. 133

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