题目内容
| 20.2-3.55-6.45 | (
|
| ||||||||||||
| (455-12.5×4)÷8.1 | [1-(
|
(1)20.2-3.55-6.45,
=20.2-(3.55+6.45),
=20.2-10,
=10.2;
(2)(
-
)÷
,
=(
-
)×
,
=
×
-
×
,
=
-1,
=
;
(3)
×
÷
,
=
×
×24,
=2;
(4)
×7+4÷
,
=
×7+4×
,
=
×(7+4),
=
×11,
=5;
(5)(455-12.5×4)÷8.1,
=(455-50)÷8.1,
=405÷8.1,
=50;
(6)[1-(
+
)]÷
,
=[1-
]÷
,
=
×
,
=
.
=20.2-(3.55+6.45),
=20.2-10,
=10.2;
(2)(
| 1 |
| 2 |
| 3 |
| 8 |
| 3 |
| 8 |
=(
| 1 |
| 2 |
| 3 |
| 8 |
| 8 |
| 3 |
=
| 1 |
| 2 |
| 8 |
| 3 |
| 3 |
| 8 |
| 8 |
| 3 |
=
| 4 |
| 3 |
=
| 1 |
| 3 |
(3)
| 1 |
| 10 |
| 5 |
| 6 |
| 1 |
| 24 |
=
| 1 |
| 10 |
| 5 |
| 6 |
=2;
(4)
| 5 |
| 11 |
| 11 |
| 5 |
=
| 5 |
| 11 |
| 5 |
| 11 |
=
| 5 |
| 11 |
=
| 5 |
| 11 |
=5;
(5)(455-12.5×4)÷8.1,
=(455-50)÷8.1,
=405÷8.1,
=50;
(6)[1-(
| 1 |
| 3 |
| 1 |
| 4 |
| 5 |
| 11 |
=[1-
| 7 |
| 12 |
| 5 |
| 11 |
=
| 5 |
| 12 |
| 11 |
| 5 |
=
| 11 |
| 12 |
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