(1)209÷69,
≈210÷70,
=3;
(2)540÷59,
≈540÷60,
=9;
(3)633÷92,
≈630÷90,
=7;
(4)324÷41,
≈320÷40,
=8;
(5)243÷38,
≈240÷40,
=6;
(6)253÷50,
≈250÷50,
=5.
(1)209÷69,
≈210÷70,
=3;
(2)540÷59,
≈540÷60,
=9;
(3)633÷92,
≈630÷90,
=7;
(4)324÷41,
≈320÷40,
=8;
(5)243÷38,
≈240÷40,
=6;
(6)253÷50,
≈250÷50,
=5.