问题
解答题
|
答案
(1)
÷(5 18
+5 6
)5 9
=
÷5 18 25 18
=
;1 5
(2)
+5 7
×(2 7
+3 10
)2 5
=
+5 7
×2 7 7 10
=
+5 7 1 5
=
;32 35
(3)(
-1 4
)×401 20
=
×40-1 4
×401 20
=10-2
=8;
(4)3×
÷4 9 3 8
=
÷4 3 3 8
=
;32 9
(5)9×
+9×4 7
+93 7
=9×(
+4 7
+1)3 7
=9×2
=18;
(6)
÷[15 22
÷(1 4
-1 2
)]1 3
=
÷[15 22
÷1 4
]1 6
=
÷15 22 3 2
=
.5 11