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Mental Addition Worksheet for Class 2 and 3

Mental maths lesson 6: Add 2-digit numbers left to right · Set 736 · 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. 1.50 + 69 =
  2. 2.53 + 78 =
  3. 3.78 + 12 =
  4. 4.37 + 86 =
  5. 5.47 + 13 =
  6. 6.73 + 79 =
  7. 7.58 + 18 =
  8. 8.21 + 51 =
  9. 9.57 + 29 =
  10. 10.74 + 83 =
  11. 11.47 + 78 =
  12. 12.57 + 32 =
  13. 13.51 + 31 =
  14. 14.28 + 22 =
  15. 15.27 + 61 =
  16. 16.31 + 42 =
  17. 17.78 + 65 =
  18. 18.62 + 38 =
  19. 19.38 + 81 =
  20. 20.44 + 26 =
  21. 21.87 + 16 =
  22. 22.38 + 18 =
  23. 23.23 + 88 =
  24. 24.30 + 29 =
  25. 25.28 + 19 =
  26. 26.30 + 49 =
  27. 27.41 + 14 =
  28. 28.21 + 42 =
  29. 29.40 + 78 =
  30. 30.86 + 74 =
  31. 31.86 + 19 =
  32. 32.75 + 46 =
  33. 33.30 + 33 =
  34. 34.63 + 12 =
  35. 35.77 + 13 =
  36. 36.58 + 42 =
  37. 37.78 + 63 =
  38. 38.37 + 83 =
  39. 39.36 + 37 =
  40. 40.86 + 58 =

Answer key

  1. 119
  2. 131
  3. 90
  4. 123
  5. 60
  6. 152
  7. 76
  8. 72
  9. 86
  10. 157
  11. 125
  12. 89
  13. 82
  14. 50
  15. 88
  16. 73
  17. 143
  18. 100
  19. 119
  20. 70
  21. 103
  22. 56
  23. 111
  24. 59
  25. 47
  26. 79
  27. 55
  28. 63
  29. 118
  30. 160
  31. 105
  32. 121
  33. 63
  34. 75
  35. 90
  36. 100
  37. 141
  38. 120
  39. 73
  40. 144

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