把下面各比化成最简整数比.
|
(1)
:2 5 7 8
=(
×40):(2 5
×40)7 8
=16:35;
(2)4.2:1 10
=4.2:0.1
=(4.2×10):(0.1×10)
=42:1;
(3)92 69
=92÷23 69÷23
=
;4 3
(4)360:140
=(360÷20):(140÷20)
=18:7.
把下面各比化成最简整数比.
|
(1)
:2 5 7 8
=(
×40):(2 5
×40)7 8
=16:35;
(2)4.2:1 10
=4.2:0.1
=(4.2×10):(0.1×10)
=42:1;
(3)92 69
=92÷23 69÷23
=
;4 3
(4)360:140
=(360÷20):(140÷20)
=18:7.