
解方程或比例.①x÷56=30②35x-14x=7③811:10=45:x④0.70.5=x35.
解方程或比例.①x÷56=30②35x-14x=7③811:10=45:x④0.70.5=x35....
解方程或比例.①x÷56=30②35x-14x=7③811:10=45:x④0.70.5=x35.
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①x÷
=30,
x÷
×
=30×
,
x=25;
②
x-
x=7,
(
-
)x=7,
x=7,
x×
=7×
,
x=20;
③
:10=
:x,
x=
×10,
x=8,
x×
=8×
,
x=11;
④
=
,
0.5x=35×0.7,
0.5x÷0.5=24.5÷0.5,
x=49.
5 |
6 |
x÷
5 |
6 |
5 |
6 |
5 |
6 |
x=25;
②
3 |
5 |
1 |
4 |
(
3 |
5 |
1 |
4 |
7 |
20 |
7 |
20 |
20 |
7 |
20 |
7 |
x=20;
③
8 |
11 |
4 |
5 |
8 |
11 |
4 |
5 |
8 |
11 |
8 |
11 |
11 |
8 |
11 |
8 |
x=11;
④
0.7 |
0.5 |
x |
35 |
0.5x=35×0.7,
0.5x÷0.5=24.5÷0.5,
x=49.
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