题目内容
递等式计算.(能简便运算的要用简便方法计算)
14760÷36-24×11
5.2×4.5+4.5×3.8+4.5
12.5×25×0.4×0.8
5-(
÷
+
)
4.8÷16+〔1÷(5
-5.09)〕
[4.2+(5.36-1.2)÷0.26]÷20.
14760÷36-24×11
5.2×4.5+4.5×3.8+4.5
12.5×25×0.4×0.8
5-(
| 6 |
| 7 |
| 3 |
| 14 |
| 6 |
| 13 |
4.8÷16+〔1÷(5
| 1 |
| 10 |
[4.2+(5.36-1.2)÷0.26]÷20.
(1)14760÷36-24×11,
=410-264,
=146;
(2)5.2×4.5+4.5×3.8+4.5,
=4.5×(5.2+3.8+1),
=4.5×10,
=45;
(3)12.5×25×0.4×0.8,
=(12.5×0.8)×(25×0.4),
=10×10,
=100;
(4)5-(
÷
+
),
=5-(4+
),
=5-4-
,
=1-
,
=
;
(5)4.8÷16+[1÷(5
-5.09)],
=4.8÷16+[1÷0.01],
=4.8÷16+100,
=0.3+100,
=100.3;
(6)[4.2+(5.36-1.2)÷0.26]÷20,
=[4.2+4.26÷0.26]÷20,
=[4.2+16]÷20,
=20.4÷20,
=1.02.
=410-264,
=146;
(2)5.2×4.5+4.5×3.8+4.5,
=4.5×(5.2+3.8+1),
=4.5×10,
=45;
(3)12.5×25×0.4×0.8,
=(12.5×0.8)×(25×0.4),
=10×10,
=100;
(4)5-(
| 6 |
| 7 |
| 3 |
| 14 |
| 6 |
| 13 |
=5-(4+
| 6 |
| 13 |
=5-4-
| 6 |
| 13 |
=1-
| 6 |
| 13 |
=
| 7 |
| 13 |
(5)4.8÷16+[1÷(5
| 1 |
| 10 |
=4.8÷16+[1÷0.01],
=4.8÷16+100,
=0.3+100,
=100.3;
(6)[4.2+(5.36-1.2)÷0.26]÷20,
=[4.2+4.26÷0.26]÷20,
=[4.2+16]÷20,
=20.4÷20,
=1.02.
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