题目内容
脱式计算:
(1)(3.8-1.8÷2)×0.5
(2)
+
÷
-
(3)
÷[
×(
×
)].
(1)(3.8-1.8÷2)×0.5
(2)
| 1 |
| 2 |
| 9 |
| 20 |
| 9 |
| 10 |
| 5 |
| 8 |
(3)
| 9 |
| 10 |
| 1 |
| 2 |
| 6 |
| 5 |
| 3 |
| 10 |
(1)(3.8-1.8÷2)×0.5,
=(3.8-0.9)×0.5,
=2.9×0.5,
=1.45;
(2)
+
÷
-
,
=
+
×
-
,
=
+
-
,
=1-
,
=
;
(3)
÷[
×(
×
)],
=
÷[
×
],
=
÷
,
=
×
,
=5.
=(3.8-0.9)×0.5,
=2.9×0.5,
=1.45;
(2)
| 1 |
| 2 |
| 9 |
| 20 |
| 9 |
| 10 |
| 5 |
| 8 |
=
| 1 |
| 2 |
| 9 |
| 20 |
| 10 |
| 9 |
| 5 |
| 8 |
=
| 1 |
| 2 |
| 1 |
| 2 |
| 5 |
| 8 |
=1-
| 5 |
| 8 |
=
| 3 |
| 8 |
(3)
| 9 |
| 10 |
| 1 |
| 2 |
| 6 |
| 5 |
| 3 |
| 10 |
=
| 9 |
| 10 |
| 1 |
| 2 |
| 9 |
| 25 |
=
| 9 |
| 10 |
| 9 |
| 50 |
=
| 9 |
| 10 |
| 50 |
| 9 |
=5.
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