用递等式计算,能简算的简算85×54÷18+7453.4÷[(1.25+0.45)×23]35×(1?37)÷51278×1213+78÷13535-
用递等式计算,能简算的简算85×54÷18+7453.4÷[(1.25+0.45)×23]35×(1?37)÷51278×1213+78÷13535-1.25+4.4-3...
用递等式计算,能简算的简算85×54÷18+7453.4÷[(1.25+0.45)×23]35×(1?37)÷51278×1213+78÷13535-1.25+4.4-3344.5×6.6+3.4×4.5.
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(1)85×54÷18+745,
=4950÷18+745,
=255+745,
=1000;
(2)3.4÷[(1.25+0.45)×23],
=3.4÷[1.7×23],
=3.4÷1.7÷23,
=2÷23,
=
;
(3)35×(1?
)÷
,
=35×
÷
,
=20×
,
=48;
(4)
×
+
÷13,
=
×
+
×
,
=
×(
+
),
=
×1,
=
;
(5)5
-1.25+4.4-3
,
=5.6-1.25+4.4-3.75,
=(5.6+4.4)-(1.25+3.75),
=10-5,
=5;
(6)4.5×6.6+3.4×4.5,
=4.5×(6.6+3.4),
=4.5×10,
=45.
=4950÷18+745,
=255+745,
=1000;
(2)3.4÷[(1.25+0.45)×23],
=3.4÷[1.7×23],
=3.4÷1.7÷23,
=2÷23,
=
2 |
23 |
(3)35×(1?
3 |
7 |
5 |
12 |
=35×
4 |
7 |
5 |
12 |
=20×
12 |
5 |
=48;
(4)
7 |
8 |
12 |
13 |
7 |
8 |
=
7 |
8 |
12 |
13 |
7 |
8 |
1 |
13 |
=
7 |
8 |
12 |
13 |
1 |
13 |
=
7 |
8 |
=
7 |
8 |
(5)5
3 |
5 |
3 |
4 |
=5.6-1.25+4.4-3.75,
=(5.6+4.4)-(1.25+3.75),
=10-5,
=5;
(6)4.5×6.6+3.4×4.5,
=4.5×(6.6+3.4),
=4.5×10,
=45.
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