900÷70用简便方法计算

用简便方法计算;
900÷70﹦验算:
540÷9÷6
720÷48.

第1个回答  2019-05-03
(1)900÷70
﹦(900÷10)÷(70÷10)
=90÷7
=12…6
验算:12×7+6
=84+6
=90;

(2)540÷9÷6
=540÷(9×6)
=540÷54
=10;

(3)720÷48
=(720÷8)÷(48÷8)
=90÷6
=(90÷3)÷(6÷3)
=30÷2
=15