题目内容
| 450÷18×25 |
| ||||||||||||||
﹙0.75-
|
| ||||||||||||||
12×﹙
|
|
(1)450÷18×25,
=25×25,
=625;
(2)
×
+
×
,
=(
+
)×
,
=1×
,
=
;
(3)﹙0.75-
﹚×﹙
+
﹚,
=
×
,
=
;
(4)
×0.375÷
,
=
÷
,
=
;
(5)12×﹙
+
-
﹚,
=12×
+12×
-12×
,
=3+2-4,
=5-4,
=1;
(6)
÷[﹙
+
﹚×
],
=
÷[
×
],
=
÷
,
=2.
=25×25,
=625;
(2)
| 5 |
| 8 |
| 1 |
| 4 |
| 1 |
| 4 |
| 3 |
| 8 |
=(
| 5 |
| 8 |
| 3 |
| 8 |
| 1 |
| 4 |
=1×
| 1 |
| 4 |
=
| 1 |
| 4 |
(3)﹙0.75-
| 3 |
| 16 |
| 2 |
| 9 |
| 1 |
| 3 |
=
| 9 |
| 16 |
| 5 |
| 9 |
=
| 5 |
| 16 |
(4)
| 2 |
| 9 |
| 6 |
| 7 |
=
| 1 |
| 12 |
| 6 |
| 7 |
=
| 7 |
| 72 |
(5)12×﹙
| 1 |
| 4 |
| 1 |
| 6 |
| 1 |
| 3 |
=12×
| 1 |
| 4 |
| 1 |
| 6 |
| 1 |
| 3 |
=3+2-4,
=5-4,
=1;
(6)
| 1 |
| 15 |
| 2 |
| 3 |
| 1 |
| 5 |
| 1 |
| 26 |
=
| 1 |
| 15 |
| 13 |
| 15 |
| 1 |
| 26 |
=
| 1 |
| 15 |
| 1 |
| 30 |
=2.
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