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Mental Addition Worksheet for Class 2 and 3

Mental maths lesson 6: Add 2-digit numbers left to right · Set 943 · 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. 1.35 + 82 =
  2. 2.55 + 26 =
  3. 3.34 + 78 =
  4. 4.77 + 82 =
  5. 5.34 + 22 =
  6. 6.52 + 31 =
  7. 7.39 + 48 =
  8. 8.65 + 63 =
  9. 9.26 + 12 =
  10. 10.76 + 77 =
  11. 11.39 + 68 =
  12. 12.78 + 58 =
  13. 13.32 + 43 =
  14. 14.72 + 89 =
  15. 15.30 + 53 =
  16. 16.55 + 19 =
  17. 17.73 + 51 =
  18. 18.61 + 65 =
  19. 19.34 + 19 =
  20. 20.25 + 77 =
  21. 21.26 + 23 =
  22. 22.58 + 23 =
  23. 23.59 + 87 =
  24. 24.88 + 29 =
  25. 25.68 + 52 =
  26. 26.51 + 22 =
  27. 27.72 + 33 =
  28. 28.47 + 49 =
  29. 29.71 + 64 =
  30. 30.44 + 44 =
  31. 31.50 + 59 =
  32. 32.37 + 33 =
  33. 33.89 + 55 =
  34. 34.39 + 82 =
  35. 35.24 + 45 =
  36. 36.21 + 53 =
  37. 37.42 + 25 =
  38. 38.71 + 28 =
  39. 39.70 + 69 =
  40. 40.42 + 24 =

Answer key

  1. 117
  2. 81
  3. 112
  4. 159
  5. 56
  6. 83
  7. 87
  8. 128
  9. 38
  10. 153
  11. 107
  12. 136
  13. 75
  14. 161
  15. 83
  16. 74
  17. 124
  18. 126
  19. 53
  20. 102
  21. 49
  22. 81
  23. 146
  24. 117
  25. 120
  26. 73
  27. 105
  28. 96
  29. 135
  30. 88
  31. 109
  32. 70
  33. 144
  34. 121
  35. 69
  36. 74
  37. 67
  38. 99
  39. 139
  40. 66

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