题目内容
计算下面各题:
| (1)2011+450÷15×30 | (2)10÷
| (3)
| (4)
|
(1)2011+450÷15×30,
=2011+30×30,
=2011+900,
=2911;
(2)10÷
×
,
=16×
,
=
;
(3)
÷6+
×
,
=
×
+
×
,
=(
+
)×
,
=
×
,
=
;
(4)
÷[
×(
-
)],
=
÷[
×
],
=
÷
,
=2.
=2011+30×30,
=2011+900,
=2911;
(2)10÷
| 5 |
| 8 |
| 4 |
| 15 |
=16×
| 4 |
| 15 |
=
| 64 |
| 15 |
(3)
| 9 |
| 20 |
| 1 |
| 6 |
| 1 |
| 20 |
=
| 9 |
| 20 |
| 1 |
| 6 |
| 1 |
| 6 |
| 1 |
| 20 |
=(
| 9 |
| 20 |
| 1 |
| 20 |
| 1 |
| 6 |
=
| 1 |
| 2 |
| 1 |
| 6 |
=
| 1 |
| 12 |
(4)
| 9 |
| 10 |
| 1 |
| 2 |
| 6 |
| 5 |
| 3 |
| 10 |
=
| 9 |
| 10 |
| 1 |
| 2 |
| 9 |
| 10 |
=
| 9 |
| 10 |
| 9 |
| 20 |
=2.
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