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Mental Addition Worksheet for Class 2 and 3

Mental maths lesson 6: Add 2-digit numbers left to right · Set 377 · 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 + 42 =
  2. 2.24 + 31 =
  3. 3.35 + 28 =
  4. 4.71 + 61 =
  5. 5.37 + 26 =
  6. 6.84 + 55 =
  7. 7.81 + 45 =
  8. 8.60 + 34 =
  9. 9.49 + 81 =
  10. 10.36 + 63 =
  11. 11.32 + 66 =
  12. 12.81 + 36 =
  13. 13.23 + 38 =
  14. 14.86 + 72 =
  15. 15.81 + 84 =
  16. 16.80 + 34 =
  17. 17.82 + 12 =
  18. 18.72 + 26 =
  19. 19.50 + 48 =
  20. 20.33 + 76 =
  21. 21.43 + 26 =
  22. 22.23 + 19 =
  23. 23.62 + 88 =
  24. 24.48 + 48 =
  25. 25.51 + 51 =
  26. 26.65 + 21 =
  27. 27.71 + 49 =
  28. 28.88 + 31 =
  29. 29.28 + 68 =
  30. 30.88 + 12 =
  31. 31.76 + 53 =
  32. 32.53 + 71 =
  33. 33.39 + 24 =
  34. 34.55 + 68 =
  35. 35.75 + 41 =
  36. 36.63 + 41 =
  37. 37.32 + 58 =
  38. 38.21 + 62 =
  39. 39.34 + 61 =
  40. 40.27 + 42 =

Answer key

  1. 79
  2. 55
  3. 63
  4. 132
  5. 63
  6. 139
  7. 126
  8. 94
  9. 130
  10. 99
  11. 98
  12. 117
  13. 61
  14. 158
  15. 165
  16. 114
  17. 94
  18. 98
  19. 98
  20. 109
  21. 69
  22. 42
  23. 150
  24. 96
  25. 102
  26. 86
  27. 120
  28. 119
  29. 96
  30. 100
  31. 129
  32. 124
  33. 63
  34. 123
  35. 116
  36. 104
  37. 90
  38. 83
  39. 95
  40. 69

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