题目内容
先化简,再求比值.
| 4.8:2.8 | 2.5千克:1.5吨 | 0.4:
| 1千米:500分米. |
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,
=
;
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,
=
;
0.4:
,
=0.4:0.7,
=(0.4×10):(0.7×10),
=4:7;
0.4:
,
=0.4÷
,
=
;
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.
=(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.
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