题目内容
计算下面各题,能简算的要简算
÷(
+
)
÷[
×(0.2+
)]
(
+
)×8+
57.5-4.25-15.75.
| 5 |
| 8 |
| 5 |
| 8 |
| 1 |
| 3 |
| 9 |
| 20 |
| 3 |
| 2 |
| 4 |
| 5 |
(
| 5 |
| 8 |
| 2 |
| 27 |
| 11 |
| 27 |
57.5-4.25-15.75.
①
÷(
+
),
=
÷(
+
),
=
×
,
=
;
②
÷[
×(0.2+
)],
=
÷[
×1],
=
×
,
=
;
③(
+
)×8+
,
=
×8+
×8+
,
=5+
,
=6;
④57.5-4.25-15.75,
=57.5-(4.25+15.75),
=57.5-20,
=37.5;
| 5 |
| 8 |
| 5 |
| 8 |
| 1 |
| 3 |
=
| 5 |
| 8 |
| 15 |
| 24 |
| 8 |
| 24 |
=
| 5 |
| 8 |
| 24 |
| 23 |
=
| 15 |
| 23 |
②
| 9 |
| 20 |
| 3 |
| 2 |
| 4 |
| 5 |
=
| 9 |
| 20 |
| 3 |
| 2 |
=
| 9 |
| 20 |
| 2 |
| 3 |
=
| 3 |
| 10 |
③(
| 5 |
| 8 |
| 2 |
| 27 |
| 11 |
| 27 |
=
| 5 |
| 8 |
| 2 |
| 27 |
| 11 |
| 27 |
=5+
| 27 |
| 27 |
=6;
④57.5-4.25-15.75,
=57.5-(4.25+15.75),
=57.5-20,
=37.5;
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