脱式计算.(1)12+513÷113(2)(9.3×56-7.3)÷214(3)345×3.5-345(4)512×527+357×5.5+11÷2(5)712-38+5.375(6)2.75×101

题目简介

脱式计算.(1)12+513÷113(2)(9.3×56-7.3)÷214(3)345×3.5-345(4)512×527+357×5.5+11÷2(5)712-38+5.375(6)2.75×101

题目详情

脱式计算.
(1)
1
2
+5
1
3
÷1
1
3

(2)(9.3×
5
6
-7.3)÷2
1
4

(3)3
4
5
×3.5-3
4
5

(4)5
1
2
×5
2
7
+3
5
7
×5.5+11÷2
(5)
7
12
-
3
8
+5.375
(6)2.75×101-2
3
4
题型:解答题难度:中档来源:不详

答案

(1)class="stub"1
2
+5class="stub"1
3
÷1class="stub"1
3

=class="stub"1
2
+class="stub"16
3
×class="stub"3
4

=class="stub"1
2
+4,
=4class="stub"1
2


(2)(9.3×class="stub"5
6
-7.3)÷2class="stub"1
4

=(class="stub"93
10
×class="stub"5
6
-7.3)×class="stub"4
9

=(class="stub"31
4
-class="stub"73
10
)×class="stub"4
9

=(class="stub"155
20
-class="stub"146
20
)×class="stub"4
9

=class="stub"9
20
×class="stub"4
9

=class="stub"1
5


(3)3class="stub"4
5
×3.5-3class="stub"4
5

=(3.5-1)×3class="stub"4
5

=2.5×class="stub"19
5

=9.5;

(4)5class="stub"1
2
×5class="stub"2
7
+3class="stub"5
7
×5.5+11÷2,
=5.5×5class="stub"2
7
+3class="stub"5
7
×5.5+5.5,
=(5class="stub"2
7
+3class="stub"5
7
+1)×5.5,
=10×5.5,
=55;

(5)class="stub"7
12
-class="stub"3
8
+5.375,
=class="stub"7
12
-0.375+5.375,
=class="stub"7
12
+(5.375-0.375),
=class="stub"7
12
+5,
=5class="stub"7
12


(6)2.75×101-2class="stub"3
4

=2.75×101-2.75,
=(101-1)×2.75,
=100×2.75,
=275.

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