用递增式计算下列各题.①914-316÷79×208②2.37+1.75+1.63+1.25③920×1125+1425×920④23+(12+23)×27.-数学

题目简介

用递增式计算下列各题.①914-316÷79×208②2.37+1.75+1.63+1.25③920×1125+1425×920④23+(12+23)×27.-数学

题目详情

用递增式计算下列各题.
①914-316÷79×208
②2.37+1.75+1.63+1.25
9
20
×
11
25
+
14
25
×
9
20

2
3
+(
1
2
+
2
3
2
7
题型:解答题难度:中档来源:不详

答案

①914-316÷79×208
=914-4×208,
=914-832,
=82;

②2.37+1.75+1.63+1.25
=(2.37+1.63)+(1.75+1.25),
=4+3,
=7;

class="stub"9
20
×class="stub"11
25
+class="stub"14
25
×class="stub"9
20

=(class="stub"11
25
+class="stub"14
25
)×class="stub"9
20

=1×class="stub"9
20

=class="stub"9
20


class="stub"2
3
+(class="stub"1
2
+class="stub"2
3
)×class="stub"2
7

=class="stub"2
3
+class="stub"7
6
×class="stub"2
7

=class="stub"2
3
+class="stub"1
3

=1.

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