In 0.056,digit at tenths place is 0,hundredths place is 5,thousandths place is 6.
In 0.506,digit at tenths place is 5,hundredths place is 0,thousandths place is 6.
In 0.56,digit at tenths place is 5,hundredths place is 6.
In 5.6,digit at units place is 5,tenths place is 6.
In 56,digit at units place is 6,tens place is 5.
By comparing place values, we get 0.056 < 0.506 < 0.56 < 5.6 < 56