题目内容
6.5-(1.6÷5-0.3)
7.2-2.7÷15-0.82
×31-1÷
÷[
×(
-
)].
7.2-2.7÷15-0.82
| 3 |
| 8 |
| 3 |
| 8 |
| 9 |
| 10 |
| 1 |
| 2 |
| 6 |
| 5 |
| 3 |
| 10 |
(1)6.5-(1.6÷5-0.3),
=6.5-(0.32-0.3),
=6.5-0.02,
=6.48;
(2)7.2-2.7÷15-0.82,
=7.2-0.18-0.82,
=7.2-(0.18+0.82),
=7.2-1,
=6.2;
(3)
| 3 |
| 8 |
| 3 |
| 8 |
=
| 93 |
| 8 |
| 8 |
| 3 |
=
| 215 |
| 24 |
(4)
| 9 |
| 10 |
| 1 |
| 2 |
| 6 |
| 5 |
| 3 |
| 10 |
=
| 9 |
| 10 |
| 1 |
| 2 |
| 9 |
| 10 |
=
| 9 |
| 10 |
| 9 |
| 20 |
=2.
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