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Mental Addition Worksheet for Class 2 and 3

Mental maths lesson 6: Add 2-digit numbers left to right · Set 975 · 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. 1.87 + 21 =
  2. 2.80 + 36 =
  3. 3.75 + 79 =
  4. 4.88 + 81 =
  5. 5.69 + 31 =
  6. 6.53 + 52 =
  7. 7.76 + 38 =
  8. 8.77 + 61 =
  9. 9.59 + 65 =
  10. 10.43 + 41 =
  11. 11.33 + 46 =
  12. 12.88 + 86 =
  13. 13.22 + 66 =
  14. 14.27 + 16 =
  15. 15.72 + 89 =
  16. 16.48 + 37 =
  17. 17.72 + 25 =
  18. 18.28 + 46 =
  19. 19.84 + 13 =
  20. 20.64 + 52 =
  21. 21.68 + 19 =
  22. 22.33 + 26 =
  23. 23.88 + 56 =
  24. 24.26 + 72 =
  25. 25.54 + 61 =
  26. 26.32 + 19 =
  27. 27.73 + 44 =
  28. 28.50 + 68 =
  29. 29.82 + 17 =
  30. 30.67 + 37 =
  31. 31.52 + 77 =
  32. 32.73 + 13 =
  33. 33.41 + 41 =
  34. 34.55 + 56 =
  35. 35.75 + 73 =
  36. 36.39 + 34 =
  37. 37.81 + 61 =
  38. 38.30 + 48 =
  39. 39.54 + 48 =
  40. 40.80 + 63 =

Answer key

  1. 108
  2. 116
  3. 154
  4. 169
  5. 100
  6. 105
  7. 114
  8. 138
  9. 124
  10. 84
  11. 79
  12. 174
  13. 88
  14. 43
  15. 161
  16. 85
  17. 97
  18. 74
  19. 97
  20. 116
  21. 87
  22. 59
  23. 144
  24. 98
  25. 115
  26. 51
  27. 117
  28. 118
  29. 99
  30. 104
  31. 129
  32. 86
  33. 82
  34. 111
  35. 148
  36. 73
  37. 142
  38. 78
  39. 102
  40. 143

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