Use the appropriate symbol '>' or '<' between the two numbers.
4187_____4186
4187__>___4186
Thousand and hundred and tens place is common but ones place is 7 in 4187 but 6 in 4186.
Hence,4187>4186
Insert appropriate symbol (<,> or = ) between the given measurements:
d) 5353km_______535.3m
1001_____1010
Use appropriate symbol ‘>’ or ‘<’ for -9 ___ -19.