问题
解答题
|
答案
(1)17×9 16
=(16+1)×9 16
=16×
+1×9 16 9 16
=9+9 16
=9
;9 16
(2)(
+3 4
)×325 8
=
×32+3 4
×325 8
=24+20
=44;
(3)
×5 9
+3 4
×5 9 1 4
=
×(5 9
+3 4
)1 4
=
×15 9
=
;5 9
(4)
×5 4
×161 8
=
×(5 4
×16)1 8
=
×25 4
=
.5 2