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Mental Addition Worksheet for Class 2 and 3

Mental maths lesson 6: Add 2-digit numbers left to right · Set 879 · 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. 1.28 + 84 =
  2. 2.33 + 19 =
  3. 3.33 + 12 =
  4. 4.57 + 79 =
  5. 5.39 + 28 =
  6. 6.24 + 52 =
  7. 7.26 + 51 =
  8. 8.23 + 33 =
  9. 9.51 + 52 =
  10. 10.75 + 88 =
  11. 11.24 + 31 =
  12. 12.44 + 35 =
  13. 13.51 + 51 =
  14. 14.72 + 66 =
  15. 15.48 + 35 =
  16. 16.43 + 53 =
  17. 17.46 + 56 =
  18. 18.38 + 86 =
  19. 19.72 + 48 =
  20. 20.46 + 14 =
  21. 21.80 + 25 =
  22. 22.58 + 64 =
  23. 23.41 + 81 =
  24. 24.76 + 29 =
  25. 25.45 + 36 =
  26. 26.88 + 48 =
  27. 27.34 + 14 =
  28. 28.53 + 61 =
  29. 29.60 + 19 =
  30. 30.44 + 12 =
  31. 31.47 + 51 =
  32. 32.76 + 62 =
  33. 33.68 + 24 =
  34. 34.42 + 69 =
  35. 35.30 + 38 =
  36. 36.36 + 87 =
  37. 37.65 + 83 =
  38. 38.38 + 88 =
  39. 39.45 + 34 =
  40. 40.80 + 46 =

Answer key

  1. 112
  2. 52
  3. 45
  4. 136
  5. 67
  6. 76
  7. 77
  8. 56
  9. 103
  10. 163
  11. 55
  12. 79
  13. 102
  14. 138
  15. 83
  16. 96
  17. 102
  18. 124
  19. 120
  20. 60
  21. 105
  22. 122
  23. 122
  24. 105
  25. 81
  26. 136
  27. 48
  28. 114
  29. 79
  30. 56
  31. 98
  32. 138
  33. 92
  34. 111
  35. 68
  36. 123
  37. 148
  38. 126
  39. 79
  40. 126

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