题目内容
求未知数的值.
(1)
=8:1
(2)1÷(
+
X)=40%
(1)
| X |
| 4.8 |
| 1 |
| 3 |
(2)1÷(
| 5 |
| 6 |
| 1 |
| 6 |
(1)
=8:1
,
1
X=4.8×8,
1
X=38.4,
1
X÷1
=38.4÷1
,
X=38.4×
,
X=28.8;
(2)1÷(
+
X)=40%,
1÷(
+
X)×(
+
X)=
×(
+
X),
×(
+
X)=1,
×
+
×
X=1,
+
X=1,
+
X-
=1-
,
X=
,
X×15=
×15,
X=10.
| X |
| 4.8 |
| 1 |
| 3 |
1
| 1 |
| 3 |
1
| 1 |
| 3 |
1
| 1 |
| 3 |
| 1 |
| 3 |
| 1 |
| 3 |
X=38.4×
| 3 |
| 4 |
X=28.8;
(2)1÷(
| 5 |
| 6 |
| 1 |
| 6 |
1÷(
| 5 |
| 6 |
| 1 |
| 6 |
| 5 |
| 6 |
| 1 |
| 6 |
| 2 |
| 5 |
| 5 |
| 6 |
| 1 |
| 6 |
| 2 |
| 5 |
| 5 |
| 6 |
| 1 |
| 6 |
| 2 |
| 5 |
| 5 |
| 6 |
| 2 |
| 5 |
| 1 |
| 6 |
| 1 |
| 3 |
| 1 |
| 15 |
| 1 |
| 3 |
| 1 |
| 15 |
| 1 |
| 3 |
| 1 |
| 3 |
| 1 |
| 15 |
| 2 |
| 3 |
| 1 |
| 15 |
| 2 |
| 3 |
X=10.
练习册系列答案
相关题目