化简.(1)0.2+0.3+0.4+0.50.2×0.3×0.4×0.5(2)2215÷(3512-21116)×258+1823(3)(123-1.6)÷[(3.15+11320)×134]×12.

题目简介

化简.(1)0.2+0.3+0.4+0.50.2×0.3×0.4×0.5(2)2215÷(3512-21116)×258+1823(3)(123-1.6)÷[(3.15+11320)×134]×12.

题目详情

化简.
(1)
0.2+0.3+0.4+0.5
0.2×0.3×0.4×0.5

(2)2
2
15
÷(3
5
12
-2
11
16
)×2
5
8
+18
2
3

(3)(1
2
3
-1.6)÷[(3.15+1
13
20
)×1
3
4
]×12.6.
题型:解答题难度:中档来源:不详

答案

(1)class="stub"0.2+0.3+0.4+0.5
0.2×0.3×0.4×0.5

=class="stub"1.4
0.012

=116class="stub"2
3


(2)2class="stub"2
15
÷(3class="stub"5
12
-2class="stub"11
16
)×2class="stub"5
8
+18class="stub"2
3

=2class="stub"2
15
÷class="stub"35
48
×class="stub"21
8
+18class="stub"2
3

=class="stub"32
15
×class="stub"48
35
×class="stub"21
8
+18class="stub"2
3

=7class="stub"17
25
+18class="stub"2
3

=26class="stub"26
75


(3)(1class="stub"2
3
-1.6)÷[(3.15+1class="stub"13
20
)×1class="stub"3
4
]×12.6,
=(1class="stub"2
3
-1class="stub"3
5
)÷[(3class="stub"3
20
+1class="stub"13
20
)×1class="stub"3
4
]×12.6,
=class="stub"1
15
÷[class="stub"24
5
×class="stub"7
4
]×12.6,
=class="stub"1
15
÷class="stub"42
5
×12.6,
=class="stub"1
15
×class="stub"5
42
×12.6,
=class="stub"1
10

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