问题
解答题
脱式计算.
|
答案
(1)(125-225÷5)×23,
=(125-45)×23,
=80×23,
=1840;
(2)78-78÷13×5,
=78-6×5,
=78-30,
=48;
(3)270÷30-180÷30,
=9-6,
=3;
(4)42+6×(12-4),
=42+6×8,
=42+48,
=90.
脱式计算.
|
(1)(125-225÷5)×23,
=(125-45)×23,
=80×23,
=1840;
(2)78-78÷13×5,
=78-6×5,
=78-30,
=48;
(3)270÷30-180÷30,
=9-6,
=3;
(4)42+6×(12-4),
=42+6×8,
=42+48,
=90.