-29又81分之80乘以(-9)
问题描述:
-29又81分之80乘以(-9)
答
269又9分之8
答
-29 80/81*9 哪知道题呢
答
-29 80/81 *(-9)
=29 80/81* 9 (负负等正)
=(30-1/81)*9 (化简)
=30*9-1/81 *9
=270-1/9
=269 8/9
答
=2269/9 =252又1/9