计算下面各题.38×19×8(159×417)×1712(56+47)×42.-数学

题目简介

计算下面各题.38×19×8(159×417)×1712(56+47)×42.-数学

题目详情

计算下面各题.
3
8
×
1
9
×8

(
15
9
×
4
17
17
12

(
5
6
+
4
7
)×42
题型:解答题难度:中档来源:不详

答案

(1)class="stub"3
8
×class="stub"1
9
×8,
=class="stub"3
8
×8×class="stub"1
9

=3×class="stub"1
9

=class="stub"1
3


(2)(class="stub"15
9
×class="stub"4
17
)×class="stub"17
12

=class="stub"15
9
×(class="stub"4
17
×class="stub"17
12
),
=class="stub"5
3
×class="stub"1
3

=class="stub"5
9


(3)(class="stub"5
6
+class="stub"4
7
)×42,
=class="stub"5
6
×42+class="stub"4
7
×42,
=35+24,
=59.

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