题目内容
怎样简便怎样算.
①
÷5+
÷2
②1.05×(3.8-0.8)÷6.3
③
÷[
×(
+
)].
①
| 7 |
| 8 |
| 7 |
| 8 |
②1.05×(3.8-0.8)÷6.3
③
| 9 |
| 20 |
| 1 |
| 2 |
| 2 |
| 5 |
| 4 |
| 5 |
①
÷5+
÷2,
=
×
+
×
,
=
×(
+
),
=
×
,
=
;
②1.05×(3.8-0.8)÷6.3,
=1.05×3÷6.3,
=3.15÷6.3,
=0.5;
③
÷[
×(
+
)],
=
÷[
×
],
=
÷
,
=
×
,
=
.
| 7 |
| 8 |
| 7 |
| 8 |
=
| 7 |
| 8 |
| 1 |
| 5 |
| 7 |
| 8 |
| 1 |
| 2 |
=
| 7 |
| 8 |
| 1 |
| 5 |
| 1 |
| 2 |
=
| 7 |
| 8 |
| 7 |
| 10 |
=
| 49 |
| 80 |
②1.05×(3.8-0.8)÷6.3,
=1.05×3÷6.3,
=3.15÷6.3,
=0.5;
③
| 9 |
| 20 |
| 1 |
| 2 |
| 2 |
| 5 |
| 4 |
| 5 |
=
| 9 |
| 20 |
| 1 |
| 2 |
| 6 |
| 5 |
=
| 9 |
| 20 |
| 3 |
| 5 |
=
| 9 |
| 20 |
| 5 |
| 3 |
=
| 3 |
| 4 |
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