4
2 is less than 3
No
0.02 is less than 0.21 because if you shift the decimal place to the right 2 times you get 2 and 21. This comparison is much more obvious which is greater.
.2 is less than .625. because you would find this the same way you would find is 2 greater than or less than 6. 6 is greater than 2 so .2 is less than .625
500 mg is 1/2 gram. That's less than a gram.
2, i think
Much less than 2 km. 9000 cm is no more than 300 feet.
2 is less than 3
2 is more than 1.
2 is less than 5.
4 is more than 2.
6 is more than 2.
8 is more than 2.
10 is more than 2.
12 is more than 2.
7 is more than 2.
15 is more than 2.