能简算就要简算.①58×1110+38÷1011②1.25×7×0.8③7.28-3.14+1.72-2.86④118÷[910-(25+14)]⑤(112+19-318)×36⑥12+14+18+1

题目简介

能简算就要简算.①58×1110+38÷1011②1.25×7×0.8③7.28-3.14+1.72-2.86④118÷[910-(25+14)]⑤(112+19-318)×36⑥12+14+18+1

题目详情

能简算就要简算.
5
8
×
11
10
+
3
8
÷
10
11
②1.25×7×0.8③7.28-3.14+1.72-2.86
11
8
÷[
9
10
-(
2
5
+
1
4
)]
⑤(
1
12
+
1
9
-
3
18
)×36
1
2
+
1
4
+
1
8
+
1
16
+
1
32
题型:解答题难度:中档来源:不详

答案

class="stub"5
8
×class="stub"11
10
+class="stub"3
8
÷class="stub"10
11

=class="stub"5
8
×class="stub"11
10
+class="stub"3
8
×class="stub"11
10

=(class="stub"5
8
+class="stub"3
8
)×class="stub"11
10

=1×class="stub"11
10

=class="stub"11
10


②1.25×7×0.8
=1.25×0.8×7,
=1×7,
=7;

③7.28-3.14+1.72-2.86
=7.28+1.72-(3.14+2.86),
=9-6,
=3;

class="stub"11
8
÷[class="stub"9
10
-(class="stub"2
5
+class="stub"1
4
)]
=class="stub"11
8
÷[class="stub"9
10
-class="stub"13
20
],
=class="stub"11
8
÷class="stub"1
4

=class="stub"11
2


⑤(class="stub"1
12
+class="stub"1
9
-class="stub"3
18
)×36
=class="stub"1
12
×36+class="stub"1
9
×36-class="stub"3
18
×36,
=3+4-6,
=1;

class="stub"1
2
+class="stub"1
4
+class="stub"1
8
+class="stub"1
16
+class="stub"1
32

=class="stub"16
32
+class="stub"8
32
+class="stub"4
32
+class="stub"2
32
+class="stub"1
32

=class="stub"31
32

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