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Mental Addition Worksheet for Class 2 and 3

Mental maths lesson 6: Add 2-digit numbers left to right · Set 913 · 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. 1.43 + 41 =
  2. 2.35 + 78 =
  3. 3.33 + 74 =
  4. 4.75 + 23 =
  5. 5.55 + 66 =
  6. 6.26 + 26 =
  7. 7.36 + 76 =
  8. 8.64 + 75 =
  9. 9.68 + 53 =
  10. 10.40 + 24 =
  11. 11.71 + 29 =
  12. 12.72 + 71 =
  13. 13.29 + 73 =
  14. 14.22 + 26 =
  15. 15.75 + 83 =
  16. 16.32 + 13 =
  17. 17.27 + 29 =
  18. 18.77 + 26 =
  19. 19.51 + 31 =
  20. 20.71 + 71 =
  21. 21.79 + 45 =
  22. 22.46 + 76 =
  23. 23.71 + 51 =
  24. 24.44 + 33 =
  25. 25.45 + 31 =
  26. 26.33 + 29 =
  27. 27.70 + 13 =
  28. 28.40 + 16 =
  29. 29.22 + 51 =
  30. 30.84 + 25 =
  31. 31.37 + 72 =
  32. 32.66 + 14 =
  33. 33.47 + 35 =
  34. 34.40 + 85 =
  35. 35.86 + 42 =
  36. 36.85 + 75 =
  37. 37.25 + 19 =
  38. 38.25 + 66 =
  39. 39.50 + 89 =
  40. 40.75 + 13 =

Answer key

  1. 84
  2. 113
  3. 107
  4. 98
  5. 121
  6. 52
  7. 112
  8. 139
  9. 121
  10. 64
  11. 100
  12. 143
  13. 102
  14. 48
  15. 158
  16. 45
  17. 56
  18. 103
  19. 82
  20. 142
  21. 124
  22. 122
  23. 122
  24. 77
  25. 76
  26. 62
  27. 83
  28. 56
  29. 73
  30. 109
  31. 109
  32. 80
  33. 82
  34. 125
  35. 128
  36. 160
  37. 44
  38. 91
  39. 139
  40. 88

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