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Mental Addition Worksheet for Class 2 and 3

Mental maths lesson 6: Add 2-digit numbers left to right · Set 994 · 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. 1.21 + 31 =
  2. 2.73 + 74 =
  3. 3.55 + 15 =
  4. 4.29 + 46 =
  5. 5.79 + 77 =
  6. 6.43 + 53 =
  7. 7.66 + 79 =
  8. 8.63 + 41 =
  9. 9.29 + 25 =
  10. 10.37 + 61 =
  11. 11.54 + 73 =
  12. 12.70 + 31 =
  13. 13.46 + 22 =
  14. 14.40 + 63 =
  15. 15.48 + 51 =
  16. 16.68 + 55 =
  17. 17.79 + 61 =
  18. 18.55 + 52 =
  19. 19.87 + 32 =
  20. 20.26 + 81 =
  21. 21.22 + 51 =
  22. 22.51 + 77 =
  23. 23.27 + 84 =
  24. 24.63 + 52 =
  25. 25.26 + 28 =
  26. 26.61 + 21 =
  27. 27.75 + 44 =
  28. 28.22 + 66 =
  29. 29.79 + 65 =
  30. 30.46 + 21 =
  31. 31.35 + 25 =
  32. 32.63 + 16 =
  33. 33.34 + 59 =
  34. 34.82 + 66 =
  35. 35.37 + 67 =
  36. 36.35 + 71 =
  37. 37.66 + 54 =
  38. 38.73 + 22 =
  39. 39.71 + 38 =
  40. 40.54 + 47 =

Answer key

  1. 52
  2. 147
  3. 70
  4. 75
  5. 156
  6. 96
  7. 145
  8. 104
  9. 54
  10. 98
  11. 127
  12. 101
  13. 68
  14. 103
  15. 99
  16. 123
  17. 140
  18. 107
  19. 119
  20. 107
  21. 73
  22. 128
  23. 111
  24. 115
  25. 54
  26. 82
  27. 119
  28. 88
  29. 144
  30. 67
  31. 60
  32. 79
  33. 93
  34. 148
  35. 104
  36. 106
  37. 120
  38. 95
  39. 109
  40. 101

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