问题
解答题
怎样算简便就怎样算. [
|
答案
(1)[
-(7 9
-7 9
)]×9 16 8 27
=[
-7 9
+7 9
]×9 16 8 27
=
×9 16 8 27
=
;1 6
(2)(
-11 12
)÷(2-3 4
)1 2
=
÷1 6 3 2
=
;1 9
(3)4.86×99+4.86
=4.86×(99+1)
=4.86×100
=486.
怎样算简便就怎样算. [
|
(1)[
-(7 9
-7 9
)]×9 16 8 27
=[
-7 9
+7 9
]×9 16 8 27
=
×9 16 8 27
=
;1 6
(2)(
-11 12
)÷(2-3 4
)1 2
=
÷1 6 3 2
=
;1 9
(3)4.86×99+4.86
=4.86×(99+1)
=4.86×100
=486.