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Mental Addition Worksheet for Class 2 and 3

Mental maths lesson 6: Add 2-digit numbers left to right · Set 947 · 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. 1.63 + 61 =
  2. 2.43 + 29 =
  3. 3.33 + 83 =
  4. 4.61 + 14 =
  5. 5.74 + 28 =
  6. 6.30 + 88 =
  7. 7.31 + 51 =
  8. 8.68 + 35 =
  9. 9.66 + 69 =
  10. 10.27 + 71 =
  11. 11.84 + 24 =
  12. 12.25 + 14 =
  13. 13.25 + 73 =
  14. 14.38 + 37 =
  15. 15.55 + 56 =
  16. 16.32 + 85 =
  17. 17.21 + 31 =
  18. 18.74 + 25 =
  19. 19.69 + 21 =
  20. 20.69 + 22 =
  21. 21.35 + 38 =
  22. 22.34 + 37 =
  23. 23.30 + 76 =
  24. 24.77 + 81 =
  25. 25.26 + 12 =
  26. 26.34 + 31 =
  27. 27.68 + 13 =
  28. 28.37 + 15 =
  29. 29.31 + 27 =
  30. 30.52 + 89 =
  31. 31.74 + 86 =
  32. 32.52 + 74 =
  33. 33.35 + 28 =
  34. 34.69 + 86 =
  35. 35.87 + 88 =
  36. 36.86 + 78 =
  37. 37.60 + 75 =
  38. 38.40 + 71 =
  39. 39.59 + 12 =
  40. 40.25 + 27 =

Answer key

  1. 124
  2. 72
  3. 116
  4. 75
  5. 102
  6. 118
  7. 82
  8. 103
  9. 135
  10. 98
  11. 108
  12. 39
  13. 98
  14. 75
  15. 111
  16. 117
  17. 52
  18. 99
  19. 90
  20. 91
  21. 73
  22. 71
  23. 106
  24. 158
  25. 38
  26. 65
  27. 81
  28. 52
  29. 58
  30. 141
  31. 160
  32. 126
  33. 63
  34. 155
  35. 175
  36. 164
  37. 135
  38. 111
  39. 71
  40. 52

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