题目内容
用简便方法计算:
|
36×(
|
|
(
|
(1)
×
×1
×
,
=(
×
)×(
×
),
=1×1,
=1;
(2)36×(
-
),
=36×
-36×
,
=15-6,
=9.
(3)
÷(3-
-
),
=
÷[3-(
+
)],
=
÷[3-1],
=
÷2,
=
.
(4)(
-
)÷
,
=
×
,
=
.
| 5 |
| 7 |
| 9 |
| 8 |
| 2 |
| 5 |
| 8 |
| 9 |
=(
| 5 |
| 7 |
| 7 |
| 5 |
| 9 |
| 8 |
| 8 |
| 9 |
=1×1,
=1;
(2)36×(
| 5 |
| 12 |
| 1 |
| 6 |
=36×
| 5 |
| 12 |
| 1 |
| 6 |
=15-6,
=9.
(3)
| 1 |
| 4 |
| 5 |
| 13 |
| 8 |
| 13 |
=
| 1 |
| 4 |
| 5 |
| 13 |
| 8 |
| 13 |
=
| 1 |
| 4 |
=
| 1 |
| 4 |
=
| 1 |
| 8 |
(4)(
| 5 |
| 6 |
| 2 |
| 3 |
| 10 |
| 9 |
=
| 1 |
| 6 |
| 9 |
| 10 |
=
| 3 |
| 20 |
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