(1)(4.5×1.6-3.6)÷
1
5 ,
=(7.2-3.6)×5,
=3.6×5,
=18;
答:这个数是18.
(2)6 ÷
6
7 -
6
7 ÷ 6,
=6×
7
6 -
6
7 ×
1
6 ,
=7-
1
7 ,
=6
6
7 ;
答:差是6
6
7 .
(1)(4.5×1.6-3.6)÷
1
5 ,
=(7.2-3.6)×5,
=3.6×5,
=18;
答:这个数是18.
(2)6 ÷
6
7 -
6
7 ÷ 6,
=6×
7
6 -
6
7 ×
1
6 ,
=7-
1
7 ,
=6
6
7 ;
答:差是6
6
7 .