问题
解答题
脱式计算.
|
答案
(1)909-(317+538),
=909-855,
=54;
(2)63÷7×21,
=9×21,
=189;
(3)302×(504-498),
=302×6,
=1812.
脱式计算.
|
(1)909-(317+538),
=909-855,
=54;
(2)63÷7×21,
=9×21,
=189;
(3)302×(504-498),
=302×6,
=1812.