要使□45÷7的商是三位数,□里最小填7;要使商是二位数,□里最大填6. .
6÷ ==== (填小数)
35: = :40==28÷ = (填小数)
0.8= : =8÷ = %= 成= 折.
0.6==12÷ = :10= %= 成.
28÷ ==2.1:2.7= :63= 0. (填循环小数)