题目内容
| 能简算的用简便方法计算. (
|
|
| ||||||||||||||||||
(1-75%)÷(1+
| 204÷
| 2.7÷(1-20%-18%) |
①(
-
÷2)×
,
=(
-
)×
,
=
×
,
=
;
②
-(
+
)×
,
=
-
×
,
=
-
,
=
;
③
×99+
,
=(99+1)×
,
=100×
,
=32;
④(1-75%)÷(1+
),
=
÷
,
=
;
⑤204÷
+204×9,
=204×91+204×9,
=(91+9)×204,
=100×204,
=20400;
⑥2.7÷(1-20%-18%),
=2.7÷(1-0.2-0.18),
=2.7÷0.62,
=4
.
| 2 |
| 5 |
| 2 |
| 5 |
| 5 |
| 3 |
=(
| 2 |
| 5 |
| 1 |
| 5 |
| 5 |
| 3 |
=
| 1 |
| 5 |
| 5 |
| 3 |
=
| 1 |
| 3 |
②
| 15 |
| 16 |
| 7 |
| 12 |
| 1 |
| 6 |
| 1 |
| 2 |
=
| 15 |
| 16 |
| 3 |
| 4 |
| 1 |
| 2 |
=
| 15 |
| 16 |
| 3 |
| 8 |
=
| 9 |
| 16 |
③
| 8 |
| 25 |
| 8 |
| 25 |
=(99+1)×
| 8 |
| 25 |
=100×
| 8 |
| 25 |
=32;
④(1-75%)÷(1+
| 1 |
| 4 |
=
| 1 |
| 4 |
| 5 |
| 4 |
=
| 1 |
| 5 |
⑤204÷
| 1 |
| 91 |
=204×91+204×9,
=(91+9)×204,
=100×204,
=20400;
⑥2.7÷(1-20%-18%),
=2.7÷(1-0.2-0.18),
=2.7÷0.62,
=4
| 11 |
| 31 |
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