题目内容
计算
6.8×
+0.32×3.2
÷
+3.75×
×0.3÷
×0.3
÷[(
-
)×
].
6.8×
| 8 |
| 25 |
| 15 |
| 4 |
| 5 |
| 9 |
| 3 |
| 5 |
| 2 |
| 3 |
| 2 |
| 3 |
| 3 |
| 7 |
| 2 |
| 3 |
| 1 |
| 2 |
| 6 |
| 7 |
(1)6.8×
+0.32×3.2,
=6.8×0.32+0.32×3.2,
=(6.8+3.2)×0.32,
=10×0.32,
=3.2;
(2)
÷
+3.75×
,
=
×
+
×
,
=
×(
+
),
=
×
,
=9;
(3)
×0.3÷
×0.3
=
÷
×0.3×0.3,
=1×0.3×0.3,
=0.09;
(4)
÷[(
-
)×
],
=
÷[
×
],
=
÷
,
=3.
| 8 |
| 25 |
=6.8×0.32+0.32×3.2,
=(6.8+3.2)×0.32,
=10×0.32,
=3.2;
(2)
| 15 |
| 4 |
| 5 |
| 9 |
| 3 |
| 5 |
=
| 15 |
| 4 |
| 9 |
| 5 |
| 15 |
| 4 |
| 3 |
| 5 |
=
| 15 |
| 4 |
| 9 |
| 5 |
| 3 |
| 5 |
=
| 15 |
| 4 |
| 12 |
| 5 |
=9;
(3)
| 2 |
| 3 |
| 2 |
| 3 |
=
| 2 |
| 3 |
| 2 |
| 3 |
=1×0.3×0.3,
=0.09;
(4)
| 3 |
| 7 |
| 2 |
| 3 |
| 1 |
| 2 |
| 6 |
| 7 |
=
| 3 |
| 7 |
| 1 |
| 6 |
| 6 |
| 7 |
=
| 3 |
| 7 |
| 1 |
| 7 |
=3.
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