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Mental Addition Worksheet for Class 2 and 3

Mental maths lesson 6: Add 2-digit numbers left to right · Set 955 · 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. 1.67 + 33 =
  2. 2.45 + 24 =
  3. 3.77 + 49 =
  4. 4.80 + 15 =
  5. 5.81 + 63 =
  6. 6.42 + 39 =
  7. 7.63 + 86 =
  8. 8.51 + 16 =
  9. 9.21 + 84 =
  10. 10.39 + 33 =
  11. 11.58 + 45 =
  12. 12.88 + 27 =
  13. 13.35 + 71 =
  14. 14.32 + 19 =
  15. 15.39 + 35 =
  16. 16.63 + 42 =
  17. 17.37 + 28 =
  18. 18.30 + 14 =
  19. 19.55 + 56 =
  20. 20.30 + 89 =
  21. 21.75 + 24 =
  22. 22.71 + 18 =
  23. 23.75 + 34 =
  24. 24.77 + 43 =
  25. 25.28 + 51 =
  26. 26.22 + 15 =
  27. 27.75 + 67 =
  28. 28.75 + 31 =
  29. 29.80 + 31 =
  30. 30.55 + 36 =
  31. 31.39 + 61 =
  32. 32.80 + 25 =
  33. 33.54 + 42 =
  34. 34.66 + 17 =
  35. 35.63 + 39 =
  36. 36.28 + 22 =
  37. 37.68 + 65 =
  38. 38.45 + 59 =
  39. 39.29 + 23 =
  40. 40.41 + 19 =

Answer key

  1. 100
  2. 69
  3. 126
  4. 95
  5. 144
  6. 81
  7. 149
  8. 67
  9. 105
  10. 72
  11. 103
  12. 115
  13. 106
  14. 51
  15. 74
  16. 105
  17. 65
  18. 44
  19. 111
  20. 119
  21. 99
  22. 89
  23. 109
  24. 120
  25. 79
  26. 37
  27. 142
  28. 106
  29. 111
  30. 91
  31. 100
  32. 105
  33. 96
  34. 83
  35. 102
  36. 50
  37. 133
  38. 104
  39. 52
  40. 60

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