题目内容
计算.
(108÷25)×(75÷18)
3.5×(20.6-16.8÷4.8)
(
-
)×(
+
)
×[7-4÷(
+
)].
(108÷25)×(75÷18)
3.5×(20.6-16.8÷4.8)
(
| 3 |
| 2 |
| 5 |
| 6 |
| 2 |
| 3 |
| 6 |
| 5 |
| 3 |
| 14 |
| 2 |
| 15 |
| 2 |
| 3 |
(1)(108÷25)×(75÷18),
=
×
,
=18;
(2)3.5×(20.6-16.8÷4.8),
=3.5×(20.6-3.5),
=3.5×17.1,
=59.85;
(3)(
-
)×(
+
),
=
×
,
=
;
(4)
×[7-4÷(
+
)],
=
×[7-4÷
],
=
×[7-4×
],
=
×[7-5],
=
×2,
=
.
=
| 108 |
| 25 |
| 75 |
| 18 |
=18;
(2)3.5×(20.6-16.8÷4.8),
=3.5×(20.6-3.5),
=3.5×17.1,
=59.85;
(3)(
| 3 |
| 2 |
| 5 |
| 6 |
| 2 |
| 3 |
| 6 |
| 5 |
=
| 2 |
| 3 |
| 28 |
| 15 |
=
| 56 |
| 45 |
(4)
| 3 |
| 14 |
| 2 |
| 15 |
| 2 |
| 3 |
=
| 3 |
| 14 |
| 4 |
| 5 |
=
| 3 |
| 14 |
| 5 |
| 4 |
=
| 3 |
| 14 |
=
| 3 |
| 14 |
=
| 3 |
| 7 |
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