题目内容
能简算的要简算.
| (
|
|
(1)
×
+
×
=(
+
)×
=1×
=
;
(2)(
-
)×15
=
×15-
×15
=12-10
=2;
(3)
÷5+
×
=
×
+
×
=(
+
)×
=1×
=
.
| 5 |
| 7 |
| 3 |
| 8 |
| 2 |
| 7 |
| 3 |
| 8 |
=(
| 5 |
| 7 |
| 2 |
| 7 |
| 3 |
| 8 |
=1×
| 3 |
| 8 |
=
| 3 |
| 8 |
(2)(
| 4 |
| 5 |
| 2 |
| 3 |
=
| 4 |
| 5 |
| 2 |
| 3 |
=12-10
=2;
(3)
| 6 |
| 7 |
| 1 |
| 7 |
| 1 |
| 5 |
=
| 6 |
| 7 |
| 1 |
| 5 |
| 1 |
| 7 |
| 1 |
| 5 |
=(
| 6 |
| 7 |
| 1 |
| 7 |
| 1 |
| 5 |
=1×
| 1 |
| 5 |
=
| 1 |
| 5 |
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