下面各题怎样算简便就怎样算.34×512÷7229.75×45+14×0.8(4-0.4)×(29+23).-数学

题目简介

下面各题怎样算简便就怎样算.34×512÷7229.75×45+14×0.8(4-0.4)×(29+23).-数学

题目详情

下面各题怎样算简便就怎样算.
3
4
×
5
12
÷
7
22

9.75×
4
5
+
1
4
×0.8

(4-0.4)×(
2
9
+
2
3
)
题型:解答题难度:中档来源:不详

答案


(1)class="stub"3
4
×class="stub"5
12
÷class="stub"7
22

=class="stub"3
4
×class="stub"5
12
×class="stub"22
7

=class="stub"55
56


(2)9.75×class="stub"4
5
+class="stub"1
4
×0.8

=9.75×0.8+0.25×0.8,
=(9.75+0.25)×0.8,
=10×0.8,
=8,

(3)(4-0.4)×(class="stub"2
9
+class="stub"2
3
)

=(4-class="stub"2
5
)×(class="stub"2
9
+class="stub"6
9
),
=class="stub"18
5
×class="stub"8
9

=3class="stub"1
5

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