题目内容
(2006?慈溪市)用递等式计算
0.36×11
+13
÷
18
-(7
-2
)-
÷
0.56÷[(3.6×
-1.5)×4.4+5.6].
0.36×11
| 4 |
| 7 |
| 3 |
| 7 |
| 7 |
| 9 |
18
| 5 |
| 9 |
| 5 |
| 13 |
| 1 |
| 3 |
| 8 |
| 13 |
| 1 |
| 2 |
0.56÷[(3.6×
| 5 |
| 12 |
分析:算式(1)把小数化成分数,根据分数四则混合运算的运算顺序.按照分数四则运算的计算法则进行计算;
算式(2),根据分数四则混合运算的运算顺序.按照分数四则运算的计算法则进行计算;
算式(3)根据小数和分数四则混合运算的运算顺序,按照它们的计算法则进行计算.
算式(2),根据分数四则混合运算的运算顺序.按照分数四则运算的计算法则进行计算;
算式(3)根据小数和分数四则混合运算的运算顺序,按照它们的计算法则进行计算.
解答:解:(1)0.36×11
+13
÷
,
=
×
+
×
,
=
+
,
+
,
=
,
=21
;
(2)18
-(7
-2
)-
÷
,
=18
-5
-
×2,
=18
-5
-
,
=18
-5
-
,
=12
;
(3)0.56÷[(3.6×
-1.5)×4.4+5.6],
=0.56÷[(1.5-1.5)×4.4+5.6],
=0.56÷[0×4.4+5.6],
=0.56÷5.6,
=0.1.
| 4 |
| 7 |
| 3 |
| 7 |
| 7 |
| 9 |
=
| 9 |
| 25 |
| 81 |
| 7 |
| 94 |
| 7 |
| 9 |
| 7 |
=
| 729 |
| 175 |
| 846 |
| 49 |
| 5103 |
| 1225 |
| 21150 |
| 1225 |
=
| 26253 |
| 1225 |
=21
| 528 |
| 1225 |
(2)18
| 5 |
| 9 |
| 5 |
| 13 |
| 1 |
| 3 |
| 8 |
| 13 |
| 1 |
| 2 |
=18
| 5 |
| 9 |
| 2 |
| 39 |
| 8 |
| 13 |
=18
| 5 |
| 9 |
| 2 |
| 39 |
| 16 |
| 13 |
=18
| 65 |
| 117 |
| 6 |
| 117 |
| 144 |
| 117 |
=12
| 32 |
| 117 |
(3)0.56÷[(3.6×
| 5 |
| 12 |
=0.56÷[(1.5-1.5)×4.4+5.6],
=0.56÷[0×4.4+5.6],
=0.56÷5.6,
=0.1.
点评:此题主要考查分数、小数四则混合运算,注意运算顺序和它们的计算法则.
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