题目内容
下面各题,怎样算简便就怎样算
(1)
| (2)(1-75%)÷(1+
| (3)
| ||||||||||||||||||
(4)(
| (5)59÷[1÷(
| (6)
|
(1)
-(
+
)×
,
=
-
×
,
=
-
,
=
;
(2)(1-75%)÷(1+
),
=
÷
,
=
;
(3)
×
+
×
,
=(
+
)×
,
=
×
,
;
(4)(
-
÷2)×
,
=(
-
)×
,
=
×
,
=
;
(5)59÷[1÷(
-9%)],
=59÷[1÷0.01],
=59÷100,
=0.59;
(6))
×79+21×0.2,
=(79+21)×0.2,
=100×0.2,
=20.
| 15 |
| 16 |
| 7 |
| 12 |
| 1 |
| 6 |
| 1 |
| 2 |
=
| 15 |
| 16 |
| 3 |
| 4 |
| 1 |
| 2 |
=
| 15 |
| 16 |
| 3 |
| 8 |
=
| 9 |
| 16 |
(2)(1-75%)÷(1+
| 1 |
| 4 |
=
| 1 |
| 4 |
| 5 |
| 4 |
=
| 1 |
| 5 |
(3)
| 5 |
| 17 |
| 9 |
| 24 |
| 7 |
| 17 |
| 9 |
| 24 |
=(
| 5 |
| 17 |
| 7 |
| 17 |
| 9 |
| 24 |
=
| 12 |
| 17 |
| 9 |
| 24 |
| 9 |
| 34 |
(4)(
| 2 |
| 5 |
| 2 |
| 5 |
| 5 |
| 3 |
=(
| 2 |
| 5 |
| 1 |
| 5 |
| 5 |
| 3 |
=
| 1 |
| 5 |
| 5 |
| 3 |
=
| 1 |
| 3 |
(5)59÷[1÷(
| 1 |
| 10 |
=59÷[1÷0.01],
=59÷100,
=0.59;
(6))
| 1 |
| 5 |
=(79+21)×0.2,
=100×0.2,
=20.
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