题目内容
怎样算简便就怎样算.
9×
+
×9
(5.6-1.6÷2)×2.5
÷[
×(
+
)].
9×
| 5 |
| 18 |
| 13 |
| 18 |
(5.6-1.6÷2)×2.5
| 1 |
| 8 |
| 1 |
| 25 |
| 2 |
| 5 |
| 1 |
| 10 |
(1)9×
+
×9,
=(
+
)×9,
=1×9,
=9;
(2)(5.6-1.6÷2)×2.5,
=(5.6-0.8)×2.5,
=4.8×2.5,
=12;
(3)
÷[
×(
+
)],
=
÷[
×
],
=
×50,
=6.25.
| 5 |
| 18 |
| 13 |
| 18 |
=(
| 5 |
| 18 |
| 13 |
| 18 |
=1×9,
=9;
(2)(5.6-1.6÷2)×2.5,
=(5.6-0.8)×2.5,
=4.8×2.5,
=12;
(3)
| 1 |
| 8 |
| 1 |
| 25 |
| 2 |
| 5 |
| 1 |
| 10 |
=
| 1 |
| 8 |
| 1 |
| 25 |
| 1 |
| 2 |
=
| 1 |
| 8 |
=6.25.
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