5 分数的加法和减法
+
1﹣
+
+
2200﹣200÷25×4
24×25 125×25×32
165×65﹣65×65 103×98
(90+125)×8 500﹣(521+504)÷25
24×[(7480﹣6480)÷100].
直接写得数.
+
= ;
﹣
= ;
﹣
= ;
5﹣
= ; 5÷0.001= ; 2.5×4= ;
+
= ; 0.4+
= ; 1﹣
= ;
+0.25= ;
+
+
= ;
﹣
+
= ;
+
+
= ; 1﹣
﹣
= .
﹣
+
+
﹣(
+
)
+
+
+
﹣(
+
)
﹣
﹣
.
﹣
= 0.5+
=
﹣
=
+
﹣
=
﹣
=
+
= 7﹣
= 0.5+
﹣
=
=
=
=
=
=
=
=
=
=
=
+
=
+
=
+
﹣
=
﹣0.2=
+
=
+
=


= 
,第二天看了全书的
,两天一共看了全书的几分之几?还剩几分之几没有看?




.
=
=
=
=
+
=
﹣
+
= 3﹣
=
m﹣
m=
+
+
+
﹣
﹣
.
﹣
=
﹣
=
+
=
+
=
+
=
﹣
=
﹣
= 0.3+
﹣


.
﹣
=
+
=
,减数是
,差是多少?




.
,这条绳子还剩几分之几?
+
=
+
=
﹣
﹣
= 1﹣
﹣
=
﹣
=
﹣
+
+
=
+
+
=
,妈妈吃了
.他们一共吃了这个西瓜的几分之几?还剩几分之几?
+
﹣
﹣
+
+
+
+
﹣(
﹣


﹣(
﹣
)
(2)
(3)
(5)3.74+
(6)
.
14.2×24﹣28.4×2 
﹣
﹣
4﹣
﹣
﹣(
+
)
﹣
﹣
﹣(
﹣
)
+
﹣
.
+
+
+
+
+
+
﹣
+(
﹣
﹣
﹣(
﹣
)
﹣(
)
﹣(
+
)
=
=
=
=
=
=
=
=
=
+
= 50×2=
﹣
= 700×5= 850﹣650=
= 33÷8= 34×2=
+
= 205×3=
+
=
﹣
=
+
=
+
=
﹣
=
﹣
=
﹣
=
+
=
= 10﹣
= 1﹣
﹣
=
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