小学数学计算题专题六混合运算类型三小数混合运算.docx

小学数学计算题专题六混合运算类型三小数混合运算.docx类型二小数混合运算
【知识讲解】
1运算顺序
小数四则混合运算的顺序与整数四则混合运算的顺序完全相同，整数四则混合运 算的运算定律对小数同样适用。
2运算方法
—个算式里，如果只含有同一级运算，要从左往右依次计算， ,这个数的25倍是多少?
，得多少?
8.— ,这个数是多少?
，差是多少？
，乘以它们的差，积是多少？
，， ,商是多少？
参考答案：
一、 【答案】


**********

二、 【答案】
=

=( )
=
= 178

= ( 100+1 )
= +
=630+
=
+
= ( + )
.=
= 116
14 - -
=4
+
= ( + )
= x 20g*
=92
-
= -
=
13-:
=13- ( )
= 13-1
=13

= ( )
=( ) x ( )
( + ) -r8
=(+ ) -8
= 104-8
=
+
= (+ )
=
=
(8+ )
=+
= 10+1
=11
+ -
= -
=
=
+
=+.
=

=( )
=
=
^
=〜
= 574
+-5
= +
=15
- -
= ;
+
=(+ )
=
=5;
+
= ( + )
=
=28
930:5—
=930- ( )
=930:3
=310
(+.+ )
=(+ )
=
= ( )
=( ) x ()
=
= 100
[5 - - ( 2 - 1 ) ]xl
=[5 - ^1]xl ,
= [5-]xl,
= ,
= ;
- ( +3 ),
= - ( 7+3 ),
=:10 ,
= 50-? 10 ,
=5 .
+
+
= ( + ) =
=
:
=-
=
:+
=+. K*|H|RZ|X|X|K)
=

= ( 1 - ) = -
= -
=
(+ ) ^ ( 10 - )
= —
=
- ：
= -
=1
— +
=—+
=+
=2
( ) : ( .