题目内容
| 计算: 3060÷15-2.5×36 | (
|
| ||||||||||
x-
| 42:
|
(1)3060÷15-2.5×36,
=204-90,
=114;
(2)(
-
)×60,
=
×60,
=10;
(3)
÷9+
×
,
=
×
+
×
,
=(
+
)×
,
=1×
,
=
;
(4)x-
x=
,
x=
,
x×
=
×
,
x=3;
(5)42:
=x:
,
x=42×
,
x×
=30×
,
x=50.
=204-90,
=114;
(2)(
| 8 |
| 15 |
| 11 |
| 30 |
=
| 5 |
| 30 |
=10;
(3)
| 7 |
| 12 |
| 1 |
| 9 |
| 5 |
| 12 |
=
| 7 |
| 12 |
| 1 |
| 9 |
| 1 |
| 9 |
| 5 |
| 12 |
=(
| 7 |
| 12 |
| 5 |
| 12 |
| 1 |
| 9 |
=1×
| 1 |
| 9 |
=
| 1 |
| 9 |
(4)x-
| 3 |
| 5 |
| 6 |
| 5 |
| 2 |
| 5 |
| 6 |
| 5 |
| 2 |
| 5 |
| 5 |
| 2 |
| 6 |
| 5 |
| 5 |
| 2 |
x=3;
(5)42:
| 3 |
| 5 |
| 5 |
| 7 |
| 3 |
| 5 |
| 5 |
| 7 |
| 3 |
| 5 |
| 5 |
| 3 |
| 5 |
| 3 |
x=50.
练习册系列答案
相关题目