问题
解答题
下面各题,怎样简便就怎样算
|
答案
(1)
= =3; (2)( |
7 |
9 |
5 |
27 |
=42+10,
=52;
(3)14÷(
×3 4
),21 5
=14÷
,63 20
=14×
,20 63
=
;40 9
(4)
×5 6
+7 8
×5 6
,1 8
=
×(5 6
+7 8
),1 8
=
;5 6
(5)
×86,3 85
=
×85+3 85
,3 85
=3
;3 85
(6)(
+3 5
)÷3 10
,7 10
=
×9 10
,10 7
=
.9 7