题目内容
【题目】
用你喜欢的方法计算: 39× | [ | 36×( |
(3﹣1.4)÷ | 1 |
|
【答案】(1)39×
,
=(38+1)×
,
=38×
+1×
,
=35+
,
=35
;
(2)[
﹣(
+
)]÷
,
=[
﹣
]÷
,
=
÷
,
=
;
(3)36×(
+
+
),
=36×
+36×
+36×
,
=16+30+10,
=46+10,
=56;
(4)(3﹣1.4)÷
,
=1.6÷
,
=6;
(5)1
×
﹣
×
,
=(1
﹣
)×
,
=1×
,
=
;
(6)
÷
÷
,
=
×
×
,
=
×(
×
),
=
×1,
=
.
【解析】解:(1)39×
,
=(38+1)×
,
=38×
+1×
,
=35+
,
=35
;
(2)[
﹣(
+
)]÷
,
=[
﹣
]÷
,
=
÷
,
=
;
(3)36×(
+
+
),
=36×
+36×
+36×
,
=16+30+10,
=46+10,
=56;
(4)(3﹣1.4)÷
,
=1.6÷
,
=6;
(5)1
×
﹣
×
,
=(1
﹣
)×
,
=1×
,
=
;
(6)
÷
÷
,
=
×
×
,
=
×(
×
),
=
×1,
=
.
练习册系列答案
相关题目