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Mental Addition Worksheet for Class 2 and 3

Mental maths lesson 6: Add 2-digit numbers left to right · Set 673 · 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. 1.36 + 82 =
  2. 2.40 + 46 =
  3. 3.22 + 41 =
  4. 4.80 + 43 =
  5. 5.64 + 19 =
  6. 6.63 + 67 =
  7. 7.88 + 33 =
  8. 8.22 + 45 =
  9. 9.78 + 72 =
  10. 10.74 + 85 =
  11. 11.33 + 21 =
  12. 12.53 + 62 =
  13. 13.58 + 67 =
  14. 14.30 + 62 =
  15. 15.21 + 63 =
  16. 16.78 + 18 =
  17. 17.59 + 41 =
  18. 18.52 + 56 =
  19. 19.66 + 36 =
  20. 20.36 + 57 =
  21. 21.72 + 35 =
  22. 22.75 + 19 =
  23. 23.76 + 56 =
  24. 24.34 + 57 =
  25. 25.63 + 81 =
  26. 26.54 + 52 =
  27. 27.57 + 45 =
  28. 28.24 + 61 =
  29. 29.75 + 31 =
  30. 30.80 + 39 =
  31. 31.74 + 45 =
  32. 32.45 + 66 =
  33. 33.22 + 63 =
  34. 34.23 + 88 =
  35. 35.88 + 61 =
  36. 36.44 + 16 =
  37. 37.37 + 33 =
  38. 38.75 + 73 =
  39. 39.52 + 24 =
  40. 40.64 + 18 =

Answer key

  1. 118
  2. 86
  3. 63
  4. 123
  5. 83
  6. 130
  7. 121
  8. 67
  9. 150
  10. 159
  11. 54
  12. 115
  13. 125
  14. 92
  15. 84
  16. 96
  17. 100
  18. 108
  19. 102
  20. 93
  21. 107
  22. 94
  23. 132
  24. 91
  25. 144
  26. 106
  27. 102
  28. 85
  29. 106
  30. 119
  31. 119
  32. 111
  33. 85
  34. 111
  35. 149
  36. 60
  37. 70
  38. 148
  39. 76
  40. 82

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