题目内容
计算.
×27÷
4×
-
×(3-
-
).
| 2 |
| 9 |
| 6 |
| 7 |
4×
| 5 |
| 8 |
| 3 |
| 5 |
| 3 |
| 4 |
| 5 |
| 13 |
| 8 |
| 13 |
(1)
×27÷
,
=
×27×
,
=7;
(2)4×
-
,
=
-
,
=
;
(3)
×(3-
-
),
=
×[3-(
+
)],
=
×[3-1],
=
×2,
=
.
| 2 |
| 9 |
| 6 |
| 7 |
=
| 2 |
| 9 |
| 7 |
| 6 |
=7;
(2)4×
| 5 |
| 8 |
| 3 |
| 5 |
=
| 5 |
| 2 |
| 3 |
| 5 |
=
| 19 |
| 10 |
(3)
| 3 |
| 4 |
| 5 |
| 13 |
| 8 |
| 13 |
=
| 3 |
| 4 |
| 5 |
| 13 |
| 8 |
| 13 |
=
| 3 |
| 4 |
=
| 3 |
| 4 |
=
| 3 |
| 2 |
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