题目内容
试一试.
①等号左边的比是1.5:x,等号右边的比的前项和后项分别是3.6和4.8,求x.
②
与
的和除它们的差,商是多少?
①等号左边的比是1.5:x,等号右边的比的前项和后项分别是3.6和4.8,求x.
②
| 3 |
| 4 |
| 1 |
| 8 |
(1)1.5:x=3.6:4.8,
3.6x=4.8×1.5,
3.6x=7.2,
x=2;
(2)(
-
)÷(
+
),
=(
-
)÷(
+
),
=
÷
,
=
.
3.6x=4.8×1.5,
3.6x=7.2,
x=2;
(2)(
| 3 |
| 4 |
| 1 |
| 8 |
| 3 |
| 4 |
| 1 |
| 8 |
=(
| 6 |
| 8 |
| 1 |
| 8 |
| 6 |
| 8 |
| 1 |
| 8 |
=
| 5 |
| 8 |
| 7 |
| 8 |
=
| 5 |
| 7 |
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