求比值:25:6.5 1.5:35 0.3:97 17:514.
(1)25:6.5
=25÷6.5
=25÷
=25×
=
;
(2)1.5:
=1.5÷0.6
=2.5;
(3)0.3:
=0.3÷
=0.3×
=
;
(4)
:
=
÷
=
×
=
.
=25÷6.5
=25÷
13 |
2 |
=25×
2 |
13 |
=
50 |
13 |
(2)1.5:
3 |
5 |
=1.5÷0.6
=2.5;
(3)0.3:
9 |
7 |
=0.3÷
9 |
7 |
=0.3×
7 |
9 |
=
7 |
30 |
(4)
1 |
7 |
5 |
14 |
=
1 |
7 |
5 |
14 |
=
1 |
7 |
14 |
5 |
=
2 |
5 |
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