问题
填空题
21÷7×□=27
5×6÷口=6
(100-□)÷5=10
27÷□=□…2
□÷A=21…7,当A最小时,□是______.
答案
(1)21÷7×□=27
3×□=27
□=27÷3=9;
(2)5×6÷口=6
30÷口=6
口=30÷6=5;
(3)(100-□)÷5=10
100-□=10×5
100-□=50
□=100-50=50;
(4)27÷□=□…2
27-2=25
25=5×5
□=5;
(5)A最小为7+1=8,
□=21×8+7
=168+7
=175.
故答案为:(5)175.