用递等式计算下面各题:10÷59+16×4920×1125+1425×920(15-14×47)×82121×(17+23)-数学

题目简介

用递等式计算下面各题:10÷59+16×4920×1125+1425×920(15-14×47)×82121×(17+23)-数学

题目详情

用递等式计算下面各题:
10÷
5
9
+
1
6
×4

9
20
×
11
25
+
14
25
×
9
20
(15-14×
4
7
)×
8
21
21×(
1
7
+
2
3
题型:解答题难度:中档来源:不详

答案

(1)10÷class="stub"5
9
+class="stub"1
6
×4,
=10×class="stub"9
5
+class="stub"1
6
×4,
=18+class="stub"2
3

=18class="stub"2
3


(2)class="stub"9
20
×class="stub"11
25
+class="stub"14
25
×class="stub"9
20

=class="stub"9
20
×(class="stub"11
25
+class="stub"14
25
),
=class="stub"9
20
×1,
=class="stub"9
20


(3)(15-14×class="stub"4
7
)×class="stub"8
21

=(15-8)×class="stub"8
21

=7×class="stub"8
21

=class="stub"8
3


(4)21×(class="stub"1
7
+class="stub"2
3
),
=21×class="stub"1
7
+class="stub"2
3
×21,
=3+14,
=17.

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