用递等式计算.(1)2184-[(44×19+44)÷5](2)450+(8.16+6.84)÷0.63(3)(45+14)÷75+56(4)[1-(112+18)×2]÷112(5)(4-7.5×4

题目简介

用递等式计算.(1)2184-[(44×19+44)÷5](2)450+(8.16+6.84)÷0.63(3)(45+14)÷75+56(4)[1-(112+18)×2]÷112(5)(4-7.5×4

题目详情

用递等式计算.
(1)2184-[(44×19+44)÷5](2)450+(8.16+6.84)÷0.63
(3)(
4
5
+
1
4
7
5
+
5
6
(4)[1-(
1
12
+
1
8
)×2]÷
1
12
(5)(4-7.5×
4
15
)÷
2
9
(6)
7
12
÷[(
1
4
+0.875)×
8
9
]-
1
4
题型:解答题难度:中档来源:不详

答案


(1)2184-[(44×19+44)÷5],
=2184-[44×(19+1)÷5],
=2184-[44×20÷5],
=2184-[880÷5],
=2184-176,
=2008;

(2)450+(8.16+6.84)÷0.63,
=450+15÷0.63,
=450+23class="stub"17
21

=473class="stub"17
21


(3)(class="stub"4
5
+class="stub"1
4
)÷class="stub"7
5
+class="stub"5
6

=class="stub"21
20
÷class="stub"7
5
+class="stub"5
6

=class="stub"3
4
+class="stub"5
6

=class="stub"19
12


(4)[1-(class="stub"1
12
+class="stub"1
8
)×2]÷class="stub"1
12

=[1-class="stub"5
24
×2]÷class="stub"1
12

=[1-class="stub"5
12
class="stub"1
12

=class="stub"7
12
÷class="stub"1
12

=7;

(5)(4-7.5×class="stub"4
15
)÷class="stub"2
9

=(4-2)÷class="stub"2
9

=2÷class="stub"2
9

=9;

(6)class="stub"7
12
÷[(class="stub"1
4
+0.875)×class="stub"8
9
]-class="stub"1
4

=class="stub"7
12
÷[1.125×class="stub"8
9
]-class="stub"1
4

=class="stub"7
12
÷1-class="stub"1
4

=class="stub"7
12
-class="stub"1
4

=class="stub"1
3

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