问题
解答题
用简便方法计算(写出主要过程).
|
答案
(1)
×5 8
+9 4
×5 8
,7 4
=
×(5 8
+9 4
),7 4
=
×4,5 8
=
;5 2
(2)(108+
)÷9,72 73
=(108+
)×72 73
,1 9
=108×
+1 9
×72 73
,1 9
=12+
,8 73
=12
.8 73
用简便方法计算(写出主要过程).
|
(1)
×5 8
+9 4
×5 8
,7 4
=
×(5 8
+9 4
),7 4
=
×4,5 8
=
;5 2
(2)(108+
)÷9,72 73
=(108+
)×72 73
,1 9
=108×
+1 9
×72 73
,1 9
=12+
,8 73
=12
.8 73