问题
解答题
选择合适的方法计算(要写出主要的计算过程). 6760÷13+17×21 3.33×4.5+4.5×6.67 (
12÷[(
|
答案
(1)6760÷13+17×21,
=520+357,
=877;
(2)3.33×4.5+4.5×6.67
=(3.33+6.67)×4.5,
=10×4.5,
=45;
(3)(
+1 5
)÷(1 6
-1 3
)2 15
=
÷11 30
,1 5
=
;11 6
(4)12÷[(
+1 4
)×5 6
]3 13
=12÷[
×13 12
],3 13
=12÷
,1 4
=48.