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化简比,求比值.(1)化简比:35:0.375;  ...
化简比,求比值.(1)化简比:35:0.375;0.54:1.6.(2)求比值:415:425;0.32:45....
化简比,求比值.(1)化简比:35:0.375; 0.54:1.6.(2)求比值:415:425; 0.32:45.
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(1)
:0.375
=(
×1000):(0.375×1000)
=600:375
=(600÷75):(375÷75)
=8:5;
0.54:1.6
=(0.54×100):(1.6×100)
=54:160
=(54÷2):(160÷2)
=27:80;
(2)
:
=
÷
=
×
=
;
0.32:
=0.32÷
=0.32×
=
.
3 |
5 |
=(
3 |
5 |
=600:375
=(600÷75):(375÷75)
=8:5;
0.54:1.6
=(0.54×100):(1.6×100)
=54:160
=(54÷2):(160÷2)
=27:80;
(2)
4 |
15 |
4 |
25 |
=
4 |
15 |
4 |
25 |
=
4 |
15 |
25 |
4 |
=
5 |
3 |
0.32:
4 |
5 |
=0.32÷
4 |
5 |
=0.32×
5 |
4 |
=
2 |
5 |
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