计算下列各题,要写出主要计算过程,能用简便方法的要用简便方法计算.①840÷24+25②14.4÷8÷0.125③26.5÷(1.65+0.85)④78-512+16⑤48×(1112-34+16)⑥

题目简介

计算下列各题,要写出主要计算过程,能用简便方法的要用简便方法计算.①840÷24+25②14.4÷8÷0.125③26.5÷(1.65+0.85)④78-512+16⑤48×(1112-34+16)⑥

题目详情

计算下列各题,要写出主要计算过程,能用简便方法的要用简便方法计算.
①840÷24+25
②14.4÷8÷0.125③26.5÷(1.65+0.85)
7
8
-
5
12
+
1
6
48×(
11
12
-
3
4
+
1
6
)
1
5
÷[1-(
1
5
+
1
7
)].
题型:解答题难度:中档来源:不详

答案

①840÷24+25
=35+25,
=60;

②14.4÷8÷0.125
=14.4÷(8×0.125),
=14.4÷1,
=14.4;

③26.5÷(1.65+0.85)
=26.5÷2.5,
=10.6;

class="stub"7
8
-class="stub"5
12
+class="stub"1
6

=class="stub"11
24
+class="stub"1
6

=class="stub"5
8


48×(class="stub"11
12
-class="stub"3
4
+class="stub"1
6
)

=48×class="stub"11
12
-48×class="stub"3
4
+48×class="stub"1
6

=44-36+8,
=16;

class="stub"1
5
÷[1-(class="stub"1
5
+class="stub"1
7
)].
=class="stub"1
5
÷[1-class="stub"12
35
],
=class="stub"1
5
÷class="stub"23
35

=class="stub"7
23

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