题目内容
(1)(0.125×8-0.5)×4. (2)
÷6+
×
. (3)
×0.25+
×
. (4)28×
.
| 9 |
| 20 |
| 1 |
| 6 |
| 1 |
| 20 |
| 5 |
| 6 |
| 1 |
| 4 |
| 1 |
| 6 |
| 5 |
| 29 |
(1)(0.125×8-0.5)×4,
=(1-0.5)×4,
=0.5×4,
=2;
(2)
÷6+
×
,
=
×
+
×
,
=
×(
+
),
=
×
,
=
;
(3)
×0.25+
×
,
=0.25×(
+
),
=0.25×1,
=0.25;
(4)28×
,
=(29-1)×
,
=29×
-1×
,
=5-
,
=4
.
=(1-0.5)×4,
=0.5×4,
=2;
(2)
| 9 |
| 20 |
| 1 |
| 6 |
| 1 |
| 20 |
=
| 9 |
| 20 |
| 1 |
| 6 |
| 1 |
| 6 |
| 1 |
| 20 |
=
| 1 |
| 6 |
| 9 |
| 20 |
| 1 |
| 20 |
=
| 1 |
| 6 |
| 1 |
| 2 |
=
| 1 |
| 12 |
(3)
| 5 |
| 6 |
| 1 |
| 4 |
| 1 |
| 6 |
=0.25×(
| 5 |
| 6 |
| 1 |
| 6 |
=0.25×1,
=0.25;
(4)28×
| 5 |
| 29 |
=(29-1)×
| 5 |
| 29 |
=29×
| 5 |
| 29 |
| 5 |
| 29 |
=5-
| 5 |
| 29 |
=4
| 24 |
| 29 |
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