问题
解答题
简便计算 (1)(
|
答案
(1)(
-1 4
)×241 6
=
×24-1 4
×241 6
=6-4
=2;
(2)
×7 11
+8 25
×3 11 7 25
=
×7 11
+8 25
×7 11 3 25
=
×(7 11
+8 25
)3 25
=
×7 11 11 25
=
;7 25
(3)
÷3+9 13
×4 13 1 3
=
×9 13
+1 3
×4 13 1 3
=(
+9 13
)×4 13 1 3
=1×1 3
=
.1 3