题目内容
怎样简便就怎样算
| 5-
| ||||||||||||||||
| [
|
(1)
+
×3,
=
+
,
=
;
(2)5-
-0.125,
=5-(0.875+0.125),
=5-1,
=4;
(3)
÷
+
×
,
=
×
+
×
,
=(
+
)×
,
=1×
,
=
;
(4)[
-(
-
)]÷
,
=[
-
]÷
,
=
÷
,
=
.
| 1 |
| 4 |
| 3 |
| 4 |
=
| 1 |
| 4 |
| 9 |
| 4 |
=
| 5 |
| 2 |
(2)5-
| 7 |
| 8 |
=5-(0.875+0.125),
=5-1,
=4;
(3)
| 7 |
| 9 |
| 11 |
| 5 |
| 2 |
| 9 |
| 5 |
| 11 |
=
| 7 |
| 9 |
| 5 |
| 11 |
| 2 |
| 9 |
| 5 |
| 11 |
=(
| 7 |
| 9 |
| 2 |
| 9 |
| 5 |
| 11 |
=1×
| 5 |
| 11 |
=
| 5 |
| 11 |
(4)[
| 1 |
| 2 |
| 3 |
| 4 |
| 3 |
| 5 |
| 7 |
| 10 |
=[
| 1 |
| 2 |
| 3 |
| 20 |
| 7 |
| 10 |
=
| 7 |
| 20 |
| 7 |
| 10 |
=
| 1 |
| 2 |
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