问题
解答题
|
答案
(1)(
+1 3
-1 12
)×241 6
=
×24+1 3
×24-1 12
×241 6
=8+2-4
=6;
(2)
×4 5
+2 3
÷1 5 3 4
=
×4 5
+2 3
×1 5 4 3
=
×(4 5
+2 3
)1 3
=
;4 5
(3)
×2 7
+8 9
×5 7 8 9
=(
+2 7
)×5 7 8 9
=1×8 9
=
;8 9
(4)(
+5 7
)×5 8 2 5
=
×5 7
+2 5
×5 8 2 5
=
+2 7 1 4
=
.15 28