问题
解答题
|
答案
(1)(5-
)×265 13
=5×26-
×265 13
=130-10
=120;
(2)
×5 7
+1 4
×3 4 5 7
=
×(5 7
+1 4
)3 4
=
×15 7
=
;5 7
(3)
×2 9
×27×335 11
=(
×27)×(2 9
×33)5 11
=6×15
=90;
(4)(
+1 12
)×245 6
=
×24+1 12
×245 6
=2+20
=22;
(5)
+1 4
×3 4 3 1
=
+1 4 9 4
=
;5 2
(6)
×34+53×19 43
-19 43 19 43
=
×(34+53-1)19 43
=
×8619 43
=38.