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Mental Addition Worksheet for Class 2 and 3

Mental maths lesson 6: Add 2-digit numbers left to right · Set 925 · 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. 1.66 + 29 =
  2. 2.36 + 59 =
  3. 3.40 + 41 =
  4. 4.32 + 25 =
  5. 5.35 + 78 =
  6. 6.56 + 39 =
  7. 7.58 + 76 =
  8. 8.31 + 69 =
  9. 9.67 + 15 =
  10. 10.60 + 31 =
  11. 11.33 + 14 =
  12. 12.53 + 57 =
  13. 13.87 + 47 =
  14. 14.74 + 69 =
  15. 15.30 + 88 =
  16. 16.48 + 37 =
  17. 17.21 + 35 =
  18. 18.39 + 27 =
  19. 19.22 + 35 =
  20. 20.28 + 17 =
  21. 21.88 + 89 =
  22. 22.56 + 22 =
  23. 23.26 + 84 =
  24. 24.84 + 44 =
  25. 25.40 + 31 =
  26. 26.50 + 31 =
  27. 27.60 + 64 =
  28. 28.53 + 13 =
  29. 29.77 + 68 =
  30. 30.29 + 38 =
  31. 31.73 + 39 =
  32. 32.26 + 65 =
  33. 33.38 + 44 =
  34. 34.54 + 76 =
  35. 35.41 + 52 =
  36. 36.46 + 83 =
  37. 37.27 + 58 =
  38. 38.78 + 25 =
  39. 39.34 + 33 =
  40. 40.21 + 45 =

Answer key

  1. 95
  2. 95
  3. 81
  4. 57
  5. 113
  6. 95
  7. 134
  8. 100
  9. 82
  10. 91
  11. 47
  12. 110
  13. 134
  14. 143
  15. 118
  16. 85
  17. 56
  18. 66
  19. 57
  20. 45
  21. 177
  22. 78
  23. 110
  24. 128
  25. 71
  26. 81
  27. 124
  28. 66
  29. 145
  30. 67
  31. 112
  32. 91
  33. 82
  34. 130
  35. 93
  36. 129
  37. 85
  38. 103
  39. 67
  40. 66

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