下面各题写出必要的计算过程.(1)415×75(2)718×914(3)914×21×29(4)1114×710×833(5)35×527×38(6)45×58×512.-数学

题目简介

下面各题写出必要的计算过程.(1)415×75(2)718×914(3)914×21×29(4)1114×710×833(5)35×527×38(6)45×58×512.-数学

题目详情

下面各题写出必要的计算过程.
(1)
4
15
×75
(2)
7
18
×
9
14
(3)
9
14
×21×
2
9
(4)
11
14
×
7
10
×
8
33
(5)
3
5
×
5
27
×
3
8
(6)
4
5
×
5
8
×
5
12
题型:解答题难度:中档来源:不详

答案

(1)class="stub"4
15
×75=class="stub"4×75
15
=20;

(2)class="stub"7
18
×class="stub"9
14
=class="stub"7×9
18×14
=class="stub"1
4


(3)class="stub"9
14
×21×class="stub"2
9
=class="stub"9×21×2
14×9
=3;

(4)class="stub"11
14
×class="stub"7
10
×class="stub"8
33
=class="stub"11×7×8
14×10×33
=class="stub"2
15


(5)class="stub"3
5
×class="stub"5
27
×class="stub"3
8
=class="stub"3×5×3
5×27×8
=class="stub"1
24


(6)class="stub"4
5
×class="stub"5
8
×class="stub"5
12
=class="stub"4×5×5
5×8×12
=class="stub"5
24

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