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计算.(能简算得要简算)3.4÷[(1.25+0.45)×23]78×1
计算.(能简算得要简算)3.4÷[(1.25+0.45)×23]78×1213+78÷1335×(1?37)÷512(156×413?26)×811....
计算.(能简算得要简算)3.4÷[(1.25+0.45)×23]78×1213+78÷1335×(1?37)÷512(156×413?26)×811.
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(1)3.4÷[(1.25+0.45)×23],
=3.4÷[1.7×23],
=3.4÷1.7÷23,
=2÷23,
=
;
(2)
×
+
÷13,
=
×
+
×
,
=
×(
+
),
=
×1,
=
;
(3)35×(1?
)÷
,
=35×
÷
,
=20×
,
=48;
(4)(156×
?26)×
,
=(48-26)×
,
=22×
,
=16.
=3.4÷[1.7×23],
=3.4÷1.7÷23,
=2÷23,
=
2 |
23 |
(2)
7 |
8 |
12 |
13 |
7 |
8 |
=
7 |
8 |
12 |
13 |
7 |
8 |
1 |
13 |
=
7 |
8 |
12 |
13 |
1 |
13 |
=
7 |
8 |
=
7 |
8 |
(3)35×(1?
3 |
7 |
5 |
12 |
=35×
4 |
7 |
5 |
12 |
=20×
12 |
5 |
=48;
(4)(156×
4 |
13 |
8 |
11 |
=(48-26)×
8 |
11 |
=22×
8 |
11 |
=16.
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