题目内容
计算,能简算的用简便方法计算.
3-(12.9-84×
)44.4×25
×(26×
)2-[
+(
-
)].
3-(12.9-84×
| 1 |
| 7 |
| 40 |
| 13 |
| 3 |
| 40 |
| 1 |
| 6 |
| 3 |
| 4 |
| 7 |
| 10 |
3-(12.9-84×
),
=3-(12.9-12),
=3-0.9,
=2.1;
44.4×25,
=11.1×4×25,
=11.1×(4×25),
=11.1×100,
=1100;
×(26×
),
=
×
×26,
=6;
2-[
+(
-
)],
=2-[
+
],
=2-
,
=1
.
| 1 |
| 7 |
=3-(12.9-12),
=3-0.9,
=2.1;
44.4×25,
=11.1×4×25,
=11.1×(4×25),
=11.1×100,
=1100;
| 40 |
| 13 |
| 3 |
| 40 |
=
| 40 |
| 13 |
| 3 |
| 40 |
=6;
2-[
| 1 |
| 6 |
| 3 |
| 4 |
| 7 |
| 10 |
=2-[
| 1 |
| 6 |
| 1 |
| 20 |
=2-
| 13 |
| 60 |
=1
| 47 |
| 60 |
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