题目内容
填上合适的数:
+
=1
×
=
÷
=
-
=1
9÷
=0.375═
=
| 2 |
| 9 |
| 7 |
| 9 |
| 7 |
| 9 |
| 2 |
| 5 |
| 5 |
| 7 |
| 5 |
| 7 |
| 5 |
| 6 |
| 5 |
| 6 |
| 5 |
| 6 |
| 6 |
| 5 |
| 1 |
| 5 |
| 1 |
| 5 |
9÷
24
24
=. |
| 32 |
| 6 |
37.5
37.5
%=0.375
0.375
(小数)分析:第(1)题找出切入点1,根据它来推算,有时用到倒数的知识,如在求1
×( )=1时,括号内直接填1
的倒数即可;第(2)题找出切入点0.375,根据0.375来推算,有些题需把0.375改写成分数
,计算简便.
| 2 |
| 5 |
| 2 |
| 5 |
| 3 |
| 8 |
解答:解:(1)
+(
)=1
×(
)=
÷(
)=
-(
)=1;
(2)9÷(24)=
=0.375=
=(37.5)%=(0.375)(小数).
故答案为:(1)
,
,
,
;(2)24,12,16,37.5,0.375.
| 2 |
| 9 |
| 7 |
| 9 |
| 2 |
| 5 |
| 5 |
| 7 |
| 5 |
| 6 |
| 5 |
| 6 |
| 6 |
| 5 |
| 1 |
| 5 |
(2)9÷(24)=
| (12) |
| 32 |
| 6 |
| (16) |
故答案为:(1)
| 7 |
| 9 |
| 5 |
| 7 |
| 5 |
| 6 |
| 1 |
| 5 |
点评:这两道题综合考查了小数、分数、百分数的互化、以及它们与除法的关系、倒数的概念等.
练习册系列答案
相关题目