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Mental Addition Worksheet for Class 2 and 3

Mental maths lesson 6: Add 2-digit numbers left to right · Set 841 · 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. 1.35 + 88 =
  2. 2.79 + 68 =
  3. 3.23 + 74 =
  4. 4.89 + 85 =
  5. 5.71 + 21 =
  6. 6.52 + 61 =
  7. 7.40 + 38 =
  8. 8.70 + 51 =
  9. 9.25 + 79 =
  10. 10.42 + 53 =
  11. 11.28 + 31 =
  12. 12.26 + 85 =
  13. 13.63 + 59 =
  14. 14.34 + 83 =
  15. 15.22 + 69 =
  16. 16.77 + 29 =
  17. 17.57 + 59 =
  18. 18.69 + 14 =
  19. 19.61 + 19 =
  20. 20.27 + 15 =
  21. 21.29 + 28 =
  22. 22.44 + 14 =
  23. 23.86 + 28 =
  24. 24.58 + 76 =
  25. 25.76 + 41 =
  26. 26.30 + 33 =
  27. 27.29 + 21 =
  28. 28.37 + 72 =
  29. 29.24 + 17 =
  30. 30.38 + 29 =
  31. 31.40 + 51 =
  32. 32.77 + 45 =
  33. 33.38 + 82 =
  34. 34.27 + 52 =
  35. 35.47 + 51 =
  36. 36.72 + 42 =
  37. 37.80 + 44 =
  38. 38.51 + 63 =
  39. 39.53 + 49 =
  40. 40.30 + 42 =

Answer key

  1. 123
  2. 147
  3. 97
  4. 174
  5. 92
  6. 113
  7. 78
  8. 121
  9. 104
  10. 95
  11. 59
  12. 111
  13. 122
  14. 117
  15. 91
  16. 106
  17. 116
  18. 83
  19. 80
  20. 42
  21. 57
  22. 58
  23. 114
  24. 134
  25. 117
  26. 63
  27. 50
  28. 109
  29. 41
  30. 67
  31. 91
  32. 122
  33. 120
  34. 79
  35. 98
  36. 114
  37. 124
  38. 114
  39. 102
  40. 72

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