化简下列各比,并求出比值.(1)15:60(2)3:2.5(3)6.75吨:50千克(4)3.5:78.
化简下列各比,并求出比值.(1)15:60(2)3:2.5(3)6.75吨:50千克(4)3.5:78....
化简下列各比,并求出比值.(1)15:60(2)3:2.5(3)6.75吨:50千克(4)3.5:78.
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(1)
:60
=(
×5):(60×5)
=1:300;
:60
=
÷60
=
;
(2)3:2.5
=(3×2):(2.5×2)
=6:5;
3:2.5
=3÷2.5
=
;
(3)6.75吨:50千克
=(6.75×1000千克):50千克
=6750:50
=(6750÷50):(50÷50)
=135:1;
6.75吨:50千克
=(6.75×1000千克)÷50千克
=6750÷50
=135;
(4)3.5:
=(3.5×
):(
×
)
=4:1;
3.5:
=3.5÷
=4.
1 |
5 |
=(
1 |
5 |
=1:300;
1 |
5 |
=
1 |
5 |
=
1 |
300 |
(2)3:2.5
=(3×2):(2.5×2)
=6:5;
3:2.5
=3÷2.5
=
6 |
5 |
(3)6.75吨:50千克
=(6.75×1000千克):50千克
=6750:50
=(6750÷50):(50÷50)
=135:1;
6.75吨:50千克
=(6.75×1000千克)÷50千克
=6750÷50
=135;
(4)3.5:
7 |
8 |
=(3.5×
8 |
7 |
7 |
8 |
8 |
7 |
=4:1;
3.5:
7 |
8 |
=3.5÷
7 |
8 |
=4.
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