题目内容
下面各题怎样简便就怎样算
14.4÷0.125÷8 | (
|
2.34×56-23.4×5.6 | ||||||||||||||
1.5×
|
1005÷[42×(
|
|
(1)14.4÷0.125÷8,
=14.4÷(0.125×8),
=14.4÷1,
=14.4;
(2)(
+
)×24×
,
=
×24×
+
×24×
,
=
+
,
=
;
(3)2.34×56-23.4×5.6,
=2.34×56-2.34×56
=2.34×(56-56),
=0;
(4)1.5×
+0.8×5.5+2×
,
=1.5×0.8+0.8×5.5+2×0.8,
=(1.5+5.5+2)×0.8,
=9×0.8,
=7.2;
(5)1005÷[42×(
-
)],
=1005÷[42×
-42×
],
=1005÷[35-30],
=1005÷5,
=201;
(6)
÷[1-(
+
)],
=
÷[1-
],
=
÷
,
=
×
,
=
.
=14.4÷(0.125×8),
=14.4÷1,
=14.4;
(2)(
1 |
6 |
1 |
8 |
1 |
5 |
=
1 |
6 |
1 |
5 |
1 |
8 |
1 |
5 |
=
4 |
5 |
3 |
5 |
=
7 |
5 |
(3)2.34×56-23.4×5.6,
=2.34×56-2.34×56
=2.34×(56-56),
=0;
(4)1.5×
4 |
5 |
4 |
5 |
=1.5×0.8+0.8×5.5+2×0.8,
=(1.5+5.5+2)×0.8,
=9×0.8,
=7.2;
(5)1005÷[42×(
5 |
6 |
5 |
7 |
=1005÷[42×
5 |
6 |
5 |
7 |
=1005÷[35-30],
=1005÷5,
=201;
(6)
12 |
35 |
1 |
5 |
1 |
7 |
=
12 |
35 |
12 |
35 |
=
12 |
35 |
24 |
35 |
=
12 |
35 |
35 |
24 |
=
1 |
2 |
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