问题
解答题
下面各题怎样简便就怎样算.
|
答案
(1)
= = |
1 |
4 |
2 |
9 |
=
×36+1 4
×362 9
=9+8
=17;
(3)
×7 11
×3 8 4 9
=
=
;7 66
(4)(
×3 5
+11 15
×4 15
)÷3 5 3 5
=
×(3 5
+11 15
)÷4 15 3 5
=1.
下面各题怎样简便就怎样算.
|
(1)
= = |
1 |
4 |
2 |
9 |
=
×36+1 4
×362 9
=9+8
=17;
(3)
×7 11
×3 8 4 9
=
=
;7 66
(4)(
×3 5
+11 15
×4 15
)÷3 5 3 5
=
×(3 5
+11 15
)÷4 15 3 5
=1.