问题
解答题
用递等式计算 (1)1-(
(2)24×7.5+253÷23 (3)8÷[(4.3-3.5)×5]. |
答案
(1)1-(
+1 6
)÷2 3 2 3
=1-(
+1 6
)×4 6
,3 2
=1-
×5 6
,3 2
=1-
,5 4
=-
;1 4
(2)24×7.5+253÷23
=180+11,
=191;
(3)8÷[(4.3-3.5)×5]
=8÷[0.8×5],
=8÷4,
=2.