问题
填空题
甲数是
|
答案
(1)
:2.5,8 5
=(
×10):(2.5×10),8 5
=16:25,
16:25=16÷25=0.64;
(2)
:2.5,8 5
=(
×10):(2.5×10),8 5
=16:25;
(3)1:3.5,
=(1×2):(3.5×2),
=2:7,
=2÷7,
=
;2 7
(4)1:3.5,
=(1×2):(3.5×2),
=2:7;
故答案为:0.64,16,25,
,2:7.2 7