问题
解答题
|
答案
×[7-4÷(3 14
+2 15
)]2 3
=
×[7-4÷3 14
],4 5
=
×[7-5],3 14
=
×2,3 14
=
;3 7
72+28÷14-14
=72+2-14,
=74-14,
=60.
|
×[7-4÷(3 14
+2 15
)]2 3
=
×[7-4÷3 14
],4 5
=
×[7-5],3 14
=
×2,3 14
=
;3 7
72+28÷14-14
=72+2-14,
=74-14,
=60.