Fill in the missing fraction:
□-321=521
Let the missing number be x
Consider
⇒x-321=521⇒x=521+321⇒x=5+321x=821
Hence, the required fraction is 821
Question 4(b) :
Fill in the missing fractions:
□−321=521
Compare the given fraction and replace '□'by an appropriate sign '<or>'
36□56
□-57=27
710-□=310