神机妙算细又巧.(计算下面各题能简算的要简算)(1)57×21×310(2)1835÷0.6×23(3)2-613÷926-23(4)910×[59÷(12-16)](5)(0.25+13)×(1.6

题目简介

神机妙算细又巧.(计算下面各题能简算的要简算)(1)57×21×310(2)1835÷0.6×23(3)2-613÷926-23(4)910×[59÷(12-16)](5)(0.25+13)×(1.6

题目详情

神机妙算细又巧.(计算下面各题能简算的要简算)
(1)
5
7
×21×
3
10
(2)
18
35
÷0.6×
2
3
(3)2-
6
13
÷
9
26
-
2
3
(4)
9
10
×[
5
9
÷(
1
2
-
1
6
)]
(5)(0.25+
1
3
)×(1.6÷
4
5
)
(6)(
3
17
+
1
39
)×17+22÷39.
题型:解答题难度:中档来源:不详

答案

(1)class="stub"5
7
×21×class="stub"3
10

=class="stub"5×21×3
7×10

=class="stub"9
2


(2)class="stub"18
35
÷0.6×class="stub"2
3

=class="stub"18
35
×class="stub"10
6
×class="stub"2
3

=class="stub"4
7


(3)2-class="stub"6
13
÷class="stub"9
26
-class="stub"2
3

=2-class="stub"4
3
-class="stub"2
3

=2-(class="stub"4
3
+class="stub"2
3
),
=2-2,
=0;

(4)class="stub"9
10
×[class="stub"5
9
÷(class="stub"1
2
-class="stub"1
6
)]

=class="stub"9
10
×[class="stub"5
9
÷class="stub"2
6
]

=class="stub"9
10
×class="stub"15
9

=class="stub"3
2


(5)(0.25+class="stub"1
3
)×(1.6÷class="stub"4
5
)

=class="stub"3
4
×2

=class="stub"3
2


(6)(class="stub"3
17
+class="stub"1
39
)×17+22÷39,
=class="stub"3
17
×17+class="stub"1
39
×17+class="stub"22
39

=3+(class="stub"17
39
+class="stub"22
39
),
=3+1,
=4.

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