题目内容
下面各题,怎样计算简便就怎样计算.
2002-540÷36×96
7.28-(1.28+0.25)
2.25×1.8+17.5×0.18
36×(
+
-
)
÷[1-(
-
)].
2002-540÷36×96
7.28-(1.28+0.25)
2.25×1.8+17.5×0.18
36×(
| 2 |
| 9 |
| 7 |
| 12 |
| 1 |
| 4 |
| 7 |
| 15 |
| 4 |
| 5 |
| 2 |
| 3 |
(1)2002-540÷36×96
=2002-540÷9÷4×96,
=2002-60÷4×96,
=2002-15×6×16,
=2002-90×16,
=2002-1440,
=562;
(2)7.28-(1.28+0.25)
=7.28-1.28-0.25,
=6-0.25,
=5.75;
(3)2.25×1.8+17.5×0.18
=2.25×1.8+1.75×1.8,
=(2.25+1.75)×1.8,
=4×1.8,
=7.2;
(4)36×(
+
-
)
=36×
+36×
-36×
,
=8+21-9,
=20;
(5)
÷[1-(
-
)].
=
÷[1-(
-
)],
=
÷[1-
],
=
×
,
=
.
=2002-540÷9÷4×96,
=2002-60÷4×96,
=2002-15×6×16,
=2002-90×16,
=2002-1440,
=562;
(2)7.28-(1.28+0.25)
=7.28-1.28-0.25,
=6-0.25,
=5.75;
(3)2.25×1.8+17.5×0.18
=2.25×1.8+1.75×1.8,
=(2.25+1.75)×1.8,
=4×1.8,
=7.2;
(4)36×(
| 2 |
| 9 |
| 7 |
| 12 |
| 1 |
| 4 |
=36×
| 2 |
| 9 |
| 7 |
| 12 |
| 1 |
| 4 |
=8+21-9,
=20;
(5)
| 7 |
| 15 |
| 4 |
| 5 |
| 2 |
| 3 |
=
| 7 |
| 15 |
| 12 |
| 15 |
| 10 |
| 15 |
=
| 7 |
| 15 |
| 2 |
| 15 |
=
| 7 |
| 15 |
| 15 |
| 13 |
=
| 7 |
| 13 |
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