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Mental Addition Worksheet for Class 2 and 3

Mental maths lesson 6: Add 2-digit numbers left to right · Set 988 · 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. 1.40 + 71 =
  2. 2.29 + 35 =
  3. 3.38 + 55 =
  4. 4.74 + 67 =
  5. 5.65 + 53 =
  6. 6.31 + 48 =
  7. 7.32 + 78 =
  8. 8.37 + 85 =
  9. 9.37 + 23 =
  10. 10.88 + 61 =
  11. 11.47 + 28 =
  12. 12.89 + 61 =
  13. 13.38 + 21 =
  14. 14.28 + 82 =
  15. 15.46 + 81 =
  16. 16.80 + 23 =
  17. 17.48 + 38 =
  18. 18.85 + 51 =
  19. 19.67 + 86 =
  20. 20.85 + 13 =
  21. 21.72 + 51 =
  22. 22.41 + 24 =
  23. 23.70 + 73 =
  24. 24.41 + 55 =
  25. 25.59 + 44 =
  26. 26.77 + 26 =
  27. 27.82 + 71 =
  28. 28.52 + 14 =
  29. 29.85 + 28 =
  30. 30.31 + 24 =
  31. 31.37 + 81 =
  32. 32.40 + 49 =
  33. 33.48 + 77 =
  34. 34.50 + 18 =
  35. 35.72 + 28 =
  36. 36.34 + 67 =
  37. 37.35 + 42 =
  38. 38.70 + 25 =
  39. 39.85 + 43 =
  40. 40.39 + 75 =

Answer key

  1. 111
  2. 64
  3. 93
  4. 141
  5. 118
  6. 79
  7. 110
  8. 122
  9. 60
  10. 149
  11. 75
  12. 150
  13. 59
  14. 110
  15. 127
  16. 103
  17. 86
  18. 136
  19. 153
  20. 98
  21. 123
  22. 65
  23. 143
  24. 96
  25. 103
  26. 103
  27. 153
  28. 66
  29. 113
  30. 55
  31. 118
  32. 89
  33. 125
  34. 68
  35. 100
  36. 101
  37. 77
  38. 95
  39. 128
  40. 114

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