|
(1)703×21,
≈700×20,
=14000;
(2)299×32,
≈300×30,
=9000;
(3)473×99,
≈470×100,
=4700;
(4)298×7,
≈300×7,
=2100;
(5)699×9,
≈700×9,
=6300;
(6)372×19,
≈380×20,
=7600.
|
(1)703×21,
≈700×20,
=14000;
(2)299×32,
≈300×30,
=9000;
(3)473×99,
≈470×100,
=4700;
(4)298×7,
≈300×7,
=2100;
(5)699×9,
≈700×9,
=6300;
(6)372×19,
≈380×20,
=7600.