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Mental Addition Worksheet for Class 2 and 3

Mental maths lesson 6: Add 2-digit numbers left to right · Set 924 · 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 + 53 =
  2. 2.30 + 62 =
  3. 3.23 + 26 =
  4. 4.78 + 29 =
  5. 5.84 + 31 =
  6. 6.37 + 41 =
  7. 7.82 + 58 =
  8. 8.36 + 61 =
  9. 9.33 + 41 =
  10. 10.27 + 78 =
  11. 11.30 + 34 =
  12. 12.29 + 41 =
  13. 13.59 + 42 =
  14. 14.77 + 25 =
  15. 15.29 + 15 =
  16. 16.88 + 27 =
  17. 17.35 + 52 =
  18. 18.40 + 21 =
  19. 19.37 + 25 =
  20. 20.34 + 71 =
  21. 21.76 + 87 =
  22. 22.85 + 71 =
  23. 23.47 + 21 =
  24. 24.46 + 87 =
  25. 25.48 + 21 =
  26. 26.63 + 72 =
  27. 27.71 + 84 =
  28. 28.85 + 44 =
  29. 29.24 + 54 =
  30. 30.25 + 36 =
  31. 31.55 + 23 =
  32. 32.54 + 31 =
  33. 33.63 + 84 =
  34. 34.41 + 19 =
  35. 35.27 + 12 =
  36. 36.67 + 29 =
  37. 37.74 + 49 =
  38. 38.57 + 14 =
  39. 39.67 + 84 =
  40. 40.65 + 16 =

Answer key

  1. 101
  2. 92
  3. 49
  4. 107
  5. 115
  6. 78
  7. 140
  8. 97
  9. 74
  10. 105
  11. 64
  12. 70
  13. 101
  14. 102
  15. 44
  16. 115
  17. 87
  18. 61
  19. 62
  20. 105
  21. 163
  22. 156
  23. 68
  24. 133
  25. 69
  26. 135
  27. 155
  28. 129
  29. 78
  30. 61
  31. 78
  32. 85
  33. 147
  34. 60
  35. 39
  36. 96
  37. 123
  38. 71
  39. 151
  40. 81

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