问题
解答题
先化简,再求比值.
|
答案
4.8:2.8,
=(4.8×10):(2.8×10),
=48:28,
=(48÷4):(28÷4),
=12:7;
4.8:2.8,
=4.8÷2.8,
=
;12 7
2.5千克:1.5吨,
=2.5千克:1500千克,
=2.5:1500,
=(2.5×10):(1500×10),
=25:15000,
=(25÷25):(15000÷25),
=1:600,
2.5千克:1.5吨,
=2.5千克:15000千克,
=2.5÷15000,
=
;1 600
0.4:
,7 10
=0.4:0.7,
=(0.4×10):(0.7×10),
=4:7;
0.4:
,7 10
=0.4÷
,7 10
=
;4 7
1千米:500分米,
=10000分米:500分米,
=10000:500,
=(10000÷500):(500÷500),
=20:1;
1千米:500分米,
=10000分米:500分米,
=10000÷500,
=20.