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Mental Addition Worksheet for Class 2 and 3

Mental maths lesson 6: Add 2-digit numbers left to right · Set 907 · 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. 1.48 + 72 =
  2. 2.29 + 63 =
  3. 3.23 + 58 =
  4. 4.30 + 14 =
  5. 5.26 + 55 =
  6. 6.21 + 37 =
  7. 7.37 + 16 =
  8. 8.34 + 51 =
  9. 9.88 + 53 =
  10. 10.68 + 66 =
  11. 11.40 + 57 =
  12. 12.45 + 74 =
  13. 13.85 + 33 =
  14. 14.38 + 49 =
  15. 15.27 + 76 =
  16. 16.55 + 77 =
  17. 17.69 + 25 =
  18. 18.36 + 31 =
  19. 19.35 + 24 =
  20. 20.49 + 21 =
  21. 21.50 + 28 =
  22. 22.56 + 66 =
  23. 23.36 + 82 =
  24. 24.59 + 84 =
  25. 25.35 + 88 =
  26. 26.85 + 73 =
  27. 27.57 + 89 =
  28. 28.39 + 46 =
  29. 29.48 + 53 =
  30. 30.60 + 24 =
  31. 31.52 + 54 =
  32. 32.30 + 82 =
  33. 33.23 + 12 =
  34. 34.55 + 73 =
  35. 35.80 + 86 =
  36. 36.72 + 71 =
  37. 37.29 + 35 =
  38. 38.27 + 74 =
  39. 39.58 + 73 =
  40. 40.22 + 66 =

Answer key

  1. 120
  2. 92
  3. 81
  4. 44
  5. 81
  6. 58
  7. 53
  8. 85
  9. 141
  10. 134
  11. 97
  12. 119
  13. 118
  14. 87
  15. 103
  16. 132
  17. 94
  18. 67
  19. 59
  20. 70
  21. 78
  22. 122
  23. 118
  24. 143
  25. 123
  26. 158
  27. 146
  28. 85
  29. 101
  30. 84
  31. 106
  32. 112
  33. 35
  34. 128
  35. 166
  36. 143
  37. 64
  38. 101
  39. 131
  40. 88

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