问题
解答题
用简便方法计算下面各题. (
15
|
答案
(1)(
+5 6
)×247 8
=
×24+5 6
×247 8
=20+21
=41;
(2)15
+3.25+44 25
+221 25 3 4
=15
+34 25
+41 4
+221 25 3 4
=(15
+44 25
)+(321 25
+21 4
)3 4
=20+6
=26.
用简便方法计算下面各题. (
15
|
(1)(
+5 6
)×247 8
=
×24+5 6
×247 8
=20+21
=41;
(2)15
+3.25+44 25
+221 25 3 4
=15
+34 25
+41 4
+221 25 3 4
=(15
+44 25
)+(321 25
+21 4
)3 4
=20+6
=26.