题目内容
神机妙算:(能简算的要写出简算过程)
(1)(9.6-10
÷1.25)÷(1
×75%)
(2)
×39+
×25+
×
(3)
÷[32×(1-
)+
]
(4)[1
+2
÷(3
-1.125)]×
-
(5)0.125×
+
×8.25+12.5%+0.374×48+0.62×37.4-3.74.
(1)(9.6-10
| 1 |
| 2 |
| 1 |
| 3 |
(2)
| 1 |
| 4 |
| 3 |
| 4 |
| 26 |
| 4 |
| 3 |
| 13 |
(3)
| 39 |
| 5 |
| 5 |
| 8 |
| 18 |
| 5 |
(4)[1
| 1 |
| 10 |
| 7 |
| 20 |
| 1 |
| 12 |
| 9 |
| 23 |
| 1 |
| 6 |
(5)0.125×
| 3 |
| 4 |
| 1 |
| 8 |
(1))(9.6-10
÷1.25)÷(1
×75%),
=(9.6-8.4)÷1,
=1.2÷1,
=1.2;
(2)
×39+
×25+
×
,
=
×13+
×25+
×
,
=(13+25+
)×
,
=40×
,
=30;
(3)
÷[32×(1-
)+
]
=
÷[32×
+
]
=
÷[12+
]
=
×
,
=
;
(4))[1
+2
÷(3
-1.125)]×
-
=[1
+
×
]×
-
,
=[1
+
]×
-
=
×
-
,
=
-
,
=
(5)0.125×
+
×8.25+12.5%+0.374×48+0.62×37.4-3.74,
=
×
+
×8.25+
+3.74×4.8+6.2×3.74-3.74,
=
×(0.75+8.25+1)+3.74×(4.8+6.2-1),
=
×10+3.74×10,
=1.25+37.4,
=38.65.
| 1 |
| 2 |
| 1 |
| 3 |
=(9.6-8.4)÷1,
=1.2÷1,
=1.2;
(2)
| 1 |
| 4 |
| 3 |
| 4 |
| 26 |
| 4 |
| 3 |
| 13 |
=
| 3 |
| 4 |
| 3 |
| 4 |
| 3 |
| 4 |
| 26 |
| 13 |
=(13+25+
| 26 |
| 13 |
| 3 |
| 4 |
=40×
| 3 |
| 4 |
=30;
(3)
| 39 |
| 5 |
| 5 |
| 8 |
| 18 |
| 5 |
=
| 39 |
| 5 |
| 3 |
| 8 |
| 18 |
| 5 |
=
| 39 |
| 5 |
| 18 |
| 5 |
=
| 39 |
| 5 |
| 5 |
| 78 |
=
| 1 |
| 2 |
(4))[1
| 1 |
| 10 |
| 7 |
| 20 |
| 1 |
| 12 |
| 9 |
| 23 |
| 1 |
| 6 |
=[1
| 1 |
| 10 |
| 47 |
| 20 |
| 24 |
| 47 |
| 9 |
| 23 |
| 1 |
| 6 |
=[1
| 1 |
| 10 |
| 6 |
| 5 |
| 9 |
| 23 |
| 1 |
| 6 |
=
| 23 |
| 10 |
| 9 |
| 23 |
| 1 |
| 6 |
=
| 9 |
| 10 |
| 1 |
| 6 |
=
| 11 |
| 15 |
(5)0.125×
| 3 |
| 4 |
| 1 |
| 8 |
=
| 1 |
| 8 |
| 3 |
| 4 |
| 1 |
| 8 |
| 1 |
| 8 |
=
| 1 |
| 8 |
=
| 1 |
| 8 |
=1.25+37.4,
=38.65.
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