Fill in the blanks according to the rule: 7 & nbsp; & nbsp; & nbsp; 3.5 & nbsp; & nbsp; & nbsp; 1.75______   0.21875.

Fill in the blanks according to the rule: 7 & nbsp; & nbsp; & nbsp; 3.5 & nbsp; & nbsp; & nbsp; 1.75______   0.21875.

1.75 △ 2 = 0.875; 0.875 △ 2 = 0.4375; verification: 0.4375 △ 2 = 0.21875; so the answer is: 0.875, 0.4375