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Mental Addition Worksheet for Class 2 and 3

Mental maths lesson 6: Add 2-digit numbers left to right · Set 817 · 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. 1.37 + 26 =
  2. 2.38 + 58 =
  3. 3.78 + 64 =
  4. 4.71 + 57 =
  5. 5.88 + 64 =
  6. 6.89 + 71 =
  7. 7.41 + 42 =
  8. 8.76 + 24 =
  9. 9.87 + 67 =
  10. 10.29 + 77 =
  11. 11.65 + 28 =
  12. 12.54 + 75 =
  13. 13.77 + 41 =
  14. 14.51 + 21 =
  15. 15.40 + 86 =
  16. 16.44 + 34 =
  17. 17.29 + 56 =
  18. 18.47 + 16 =
  19. 19.59 + 71 =
  20. 20.76 + 64 =
  21. 21.81 + 87 =
  22. 22.44 + 79 =
  23. 23.33 + 86 =
  24. 24.86 + 88 =
  25. 25.21 + 55 =
  26. 26.72 + 31 =
  27. 27.28 + 57 =
  28. 28.26 + 87 =
  29. 29.44 + 71 =
  30. 30.38 + 34 =
  31. 31.26 + 73 =
  32. 32.42 + 46 =
  33. 33.41 + 89 =
  34. 34.69 + 27 =
  35. 35.47 + 21 =
  36. 36.33 + 34 =
  37. 37.28 + 72 =
  38. 38.77 + 81 =
  39. 39.38 + 24 =
  40. 40.85 + 52 =

Answer key

  1. 63
  2. 96
  3. 142
  4. 128
  5. 152
  6. 160
  7. 83
  8. 100
  9. 154
  10. 106
  11. 93
  12. 129
  13. 118
  14. 72
  15. 126
  16. 78
  17. 85
  18. 63
  19. 130
  20. 140
  21. 168
  22. 123
  23. 119
  24. 174
  25. 76
  26. 103
  27. 85
  28. 113
  29. 115
  30. 72
  31. 99
  32. 88
  33. 130
  34. 96
  35. 68
  36. 67
  37. 100
  38. 158
  39. 62
  40. 137

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