题目内容
在横线里填上适当的数使计算简便
| 99×
|
(1)
÷(4)+
×
,
=
×
+
×
,
=(
+
)×
,
=1×
,
=
;
(2)99×
+(
),
=(99+1)×
,
=100×
,
=80.
故答案为:4;
.
| 5 |
| 13 |
| 8 |
| 13 |
| 1 |
| 4 |
=
| 5 |
| 13 |
| 1 |
| 4 |
| 8 |
| 13 |
| 1 |
| 4 |
=(
| 5 |
| 13 |
| 8 |
| 13 |
| 1 |
| 4 |
=1×
| 1 |
| 4 |
=
| 1 |
| 4 |
(2)99×
| 4 |
| 5 |
| 4 |
| 5 |
=(99+1)×
| 4 |
| 5 |
=100×
| 4 |
| 5 |
=80.
故答案为:4;
| 4 |
| 5 |
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